Finding the Fourth Proportional to 57,605.50, 79,495.59 and 31,109.50

Step by Step Solution

1. Step 1: Write the proportion equation
   57,605.50 : 79,495.59 = 31,109.50 : x
2. Step 2: Convert to fraction form
   57,605.50/79,495.59 = 31,109.50/x
3. Step 3: Cross multiply
   57,605.50x = 79,495.59 × 31,109.50
4. Step 4: Simplify right side
   57,605.50x = 2,473,068,057.11
5. Step 5: Solve for x
   x = 2,473,068,057.11/57,605.50
6. Step 6: Final answer
   x = 42,931.11