Finding the Fourth Proportional to 1,320,962,209.02, 1,981,443,663.45 and 388,285,095.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,320,962,209.02 : 1,981,443,663.45 = 388,285,095.42 : x
2. Step 2: Convert to fraction form
   1,320,962,209.02/1,981,443,663.45 = 388,285,095.42/x
3. Step 3: Cross multiply
   1,320,962,209.02x = 1,981,443,663.45 × 388,285,095.42
4. Step 4: Simplify right side
   1,320,962,209.02x = 769,365,041,932,037,632
5. Step 5: Solve for x
   x = 769,365,041,932,037,632/1,320,962,209.02
6. Step 6: Final answer
   x = 582,427,745.99