Finding the Fourth Proportional to 57,608.50, 79,499.74 and 31,112.50

Step by Step Solution

1. Step 1: Write the proportion equation
   57,608.50 : 79,499.74 = 31,112.50 : x
2. Step 2: Convert to fraction form
   57,608.50/79,499.74 = 31,112.50/x
3. Step 3: Cross multiply
   57,608.50x = 79,499.74 × 31,112.50
4. Step 4: Simplify right side
   57,608.50x = 2,473,435,660.75
5. Step 5: Solve for x
   x = 2,473,435,660.75/57,608.50
6. Step 6: Final answer
   x = 42,935.26