Finding the Fourth Proportional to 2,056,678,886.12, 2,839,085,778.88 and 1,388,529,006.84

Step by Step Solution

1. Step 1: Write the proportion equation
   2,056,678,886.12 : 2,839,085,778.88 = 1,388,529,006.84 : x
2. Step 2: Convert to fraction form
   2,056,678,886.12/2,839,085,778.88 = 1,388,529,006.84/x
3. Step 3: Cross multiply
   2,056,678,886.12x = 2,839,085,778.88 × 1,388,529,006.84
4. Step 4: Simplify right side
   2,056,678,886.12x = 3,942,152,956,881,814,016
5. Step 5: Solve for x
   x = 3,942,152,956,881,814,016/2,056,678,886.12
6. Step 6: Final answer
   x = 1,916,756,662.15