Finding the Fourth Proportional to 57,613.50, 79,506.64 and 31,117.50

Step by Step Solution

1. Step 1: Write the proportion equation
   57,613.50 : 79,506.64 = 31,117.50 : x
2. Step 2: Convert to fraction form
   57,613.50/79,506.64 = 31,117.50/x
3. Step 3: Cross multiply
   57,613.50x = 79,506.64 × 31,117.50
4. Step 4: Simplify right side
   57,613.50x = 2,474,047,870.20
5. Step 5: Solve for x
   x = 2,474,047,870.20/57,613.50
6. Step 6: Final answer
   x = 42,942.16