Finding the Fourth Proportional to 1,399,111.48, 2,098,432.47 and 388,336.14

Step by Step Solution

1. Step 1: Write the proportion equation
   1,399,111.48 : 2,098,432.47 = 388,336.14 : x
2. Step 2: Convert to fraction form
   1,399,111.48/2,098,432.47 = 388,336.14/x
3. Step 3: Cross multiply
   1,399,111.48x = 2,098,432.47 × 388,336.14
4. Step 4: Simplify right side
   1,399,111.48x = 814,897,166,906.73
5. Step 5: Solve for x
   x = 814,897,166,906.73/1,399,111.48
6. Step 6: Final answer
   x = 582,439.05