Finding the Fourth Proportional to 1,388,903,426.29, 2,091,669,377.56 and 1,264,928,869.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,388,903,426.29 : 2,091,669,377.56 = 1,264,928,869.81 : x
2. Step 2: Convert to fraction form
   1,388,903,426.29/2,091,669,377.56 = 1,264,928,869.81/x
3. Step 3: Cross multiply
   1,388,903,426.29x = 2,091,669,377.56 × 1,264,928,869.81
4. Step 4: Simplify right side
   1,388,903,426.29x = 2,645,812,981,773,156,864
5. Step 5: Solve for x
   x = 2,645,812,981,773,156,864/1,388,903,426.29
6. Step 6: Final answer
   x = 1,904,965,407.74