Finding the Fourth Proportional to 56,911.86, 85,359.70 and 31,274.15

Step by Step Solution

1. Step 1: Write the proportion equation
   56,911.86 : 85,359.70 = 31,274.15 : x
2. Step 2: Convert to fraction form
   56,911.86/85,359.70 = 31,274.15/x
3. Step 3: Cross multiply
   56,911.86x = 85,359.70 × 31,274.15
4. Step 4: Simplify right side
   56,911.86x = 2,669,552,061.76
5. Step 5: Solve for x
   x = 2,669,552,061.76/56,911.86
6. Step 6: Final answer
   x = 46,906.78