Finding the Fourth Proportional to 56,931.52, 78,565.58 and 31,781

Step by Step Solution

1. Step 1: Write the proportion equation
   56,931.52 : 78,565.58 = 31,781 : x
2. Step 2: Convert to fraction form
   56,931.52/78,565.58 = 31,781/x
3. Step 3: Cross multiply
   56,931.52x = 78,565.58 × 31,781
4. Step 4: Simplify right side
   56,931.52x = 2,496,892,697.98
5. Step 5: Solve for x
   x = 2,496,892,697.98/56,931.52
6. Step 6: Final answer
   x = 43,857.83