Finding the Fourth Proportional to 693,314.56, 956,766.72 and 391,490.56

Step by Step Solution

1. Step 1: Write the proportion equation
   693,314.56 : 956,766.72 = 391,490.56 : x
2. Step 2: Convert to fraction form
   693,314.56/956,766.72 = 391,490.56/x
3. Step 3: Cross multiply
   693,314.56x = 956,766.72 × 391,490.56
4. Step 4: Simplify right side
   693,314.56x = 374,565,139,002.16
5. Step 5: Solve for x
   x = 374,565,139,002.16/693,314.56
6. Step 6: Final answer
   x = 540,252.81