Finding the Fourth Proportional to 714,061.34, 985,371.98 and 391,764.78

Step by Step Solution

1. Step 1: Write the proportion equation
   714,061.34 : 985,371.98 = 391,764.78 : x
2. Step 2: Convert to fraction form
   714,061.34/985,371.98 = 391,764.78/x
3. Step 3: Cross multiply
   714,061.34x = 985,371.98 × 391,764.78
4. Step 4: Simplify right side
   714,061.34x = 386,034,036,962.86
5. Step 5: Solve for x
   x = 386,034,036,962.86/714,061.34
6. Step 6: Final answer
   x = 540,617.47