Finding the Fourth Proportional to 89,890.10, 123,995.96 and 57,613.22

Step by Step Solution

1. Step 1: Write the proportion equation
   89,890.10 : 123,995.96 = 57,613.22 : x
2. Step 2: Convert to fraction form
   89,890.10/123,995.96 = 57,613.22/x
3. Step 3: Cross multiply
   89,890.10x = 123,995.96 × 57,613.22
4. Step 4: Simplify right side
   89,890.10x = 7,143,807,317.13
5. Step 5: Solve for x
   x = 7,143,807,317.13/89,890.10
6. Step 6: Final answer
   x = 79,472.68