Finding the Fourth Proportional to 56,715.54, 78,256.17 and 31,560.18

Step by Step Solution

1. Step 1: Write the proportion equation
   56,715.54 : 78,256.17 = 31,560.18 : x
2. Step 2: Convert to fraction form
   56,715.54/78,256.17 = 31,560.18/x
3. Step 3: Cross multiply
   56,715.54x = 78,256.17 × 31,560.18
4. Step 4: Simplify right side
   56,715.54x = 2,469,778,811.31
5. Step 5: Solve for x
   x = 2,469,778,811.31/56,715.54
6. Step 6: Final answer
   x = 43,546.77