Finding the Fourth Proportional to 189,242.34, 261,142.50 and 108,613.12

Step by Step Solution

1. Step 1: Write the proportion equation
   189,242.34 : 261,142.50 = 108,613.12 : x
2. Step 2: Convert to fraction form
   189,242.34/261,142.50 = 108,613.12/x
3. Step 3: Cross multiply
   189,242.34x = 261,142.50 × 108,613.12
4. Step 4: Simplify right side
   189,242.34x = 28,363,501,689.60
5. Step 5: Solve for x
   x = 28,363,501,689.60/189,242.34
6. Step 6: Final answer
   x = 149,879.26