Finding the Fourth Proportional to 57,687.50, 79,608.76 and 31,191.50

Step by Step Solution

1. Step 1: Write the proportion equation
   57,687.50 : 79,608.76 = 31,191.50 : x
2. Step 2: Convert to fraction form
   57,687.50/79,608.76 = 31,191.50/x
3. Step 3: Cross multiply
   57,687.50x = 79,608.76 × 31,191.50
4. Step 4: Simplify right side
   57,687.50x = 2,483,116,637.54
5. Step 5: Solve for x
   x = 2,483,116,637.54/57,687.50
6. Step 6: Final answer
   x = 43,044.28