Finding the Fourth Proportional to 57,111.78, 78,811.58 and 31,269.85

Step by Step Solution

1. Step 1: Write the proportion equation
   57,111.78 : 78,811.58 = 31,269.85 : x
2. Step 2: Convert to fraction form
   57,111.78/78,811.58 = 31,269.85/x
3. Step 3: Cross multiply
   57,111.78x = 78,811.58 × 31,269.85
4. Step 4: Simplify right side
   57,111.78x = 2,464,426,166.01
5. Step 5: Solve for x
   x = 2,464,426,166.01/57,111.78
6. Step 6: Final answer
   x = 43,150.92