Finding the Fourth Proportional to 85,679.55, 128,516.12 and 22,499.10

Step by Step Solution

1. Step 1: Write the proportion equation
   85,679.55 : 128,516.12 = 22,499.10 : x
2. Step 2: Convert to fraction form
   85,679.55/128,516.12 = 22,499.10/x
3. Step 3: Cross multiply
   85,679.55x = 128,516.12 × 22,499.10
4. Step 4: Simplify right side
   85,679.55x = 2,891,496,280.42
5. Step 5: Solve for x
   x = 2,891,496,280.42/85,679.55
6. Step 6: Final answer
   x = 33,747.80