Finding the Fourth Proportional to 57,618.50, 79,513.54 and 31,122.50

Step by Step Solution

1. Step 1: Write the proportion equation
   57,618.50 : 79,513.54 = 31,122.50 : x
2. Step 2: Convert to fraction form
   57,618.50/79,513.54 = 31,122.50/x
3. Step 3: Cross multiply
   57,618.50x = 79,513.54 × 31,122.50
4. Step 4: Simplify right side
   57,618.50x = 2,474,660,148.65
5. Step 5: Solve for x
   x = 2,474,660,148.65/57,618.50
6. Step 6: Final answer
   x = 42,949.06