Finding the Fourth Proportional to 57,609.50, 79,501.12 and 31,113.50

Step by Step Solution

1. Step 1: Write the proportion equation
   57,609.50 : 79,501.12 = 31,113.50 : x
2. Step 2: Convert to fraction form
   57,609.50/79,501.12 = 31,113.50/x
3. Step 3: Cross multiply
   57,609.50x = 79,501.12 × 31,113.50
4. Step 4: Simplify right side
   57,609.50x = 2,473,558,097.12
5. Step 5: Solve for x
   x = 2,473,558,097.12/57,609.50
6. Step 6: Final answer
   x = 42,936.64