Finding the Fourth Proportional to 57,072.86, 78,756.27 and 31,917.50

Step by Step Solution

1. Step 1: Write the proportion equation
   57,072.86 : 78,756.27 = 31,917.50 : x
2. Step 2: Convert to fraction form
   57,072.86/78,756.27 = 31,917.50/x
3. Step 3: Cross multiply
   57,072.86x = 78,756.27 × 31,917.50
4. Step 4: Simplify right side
   57,072.86x = 2,513,703,247.73
5. Step 5: Solve for x
   x = 2,513,703,247.73/57,072.86
6. Step 6: Final answer
   x = 44,043.76