Finding the Fourth Proportional to 2,068,240,367.73, 2,855,052,387.91 and 1,390,450,412.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,068,240,367.73 : 2,855,052,387.91 = 1,390,450,412.10 : x
2. Step 2: Convert to fraction form
   2,068,240,367.73/2,855,052,387.91 = 1,390,450,412.10/x
3. Step 3: Cross multiply
   2,068,240,367.73x = 2,855,052,387.91 × 1,390,450,412.10
4. Step 4: Simplify right side
   2,068,240,367.73x = 3,969,808,769,348,919,808
5. Step 5: Solve for x
   x = 3,969,808,769,348,919,808/2,068,240,367.73
6. Step 6: Final answer
   x = 1,919,413,638.42