Finding the Fourth Proportional to 126,506.67, 189,791.12 and 89,139.72

Step by Step Solution

1. Step 1: Write the proportion equation
   126,506.67 : 189,791.12 = 89,139.72 : x
2. Step 2: Convert to fraction form
   126,506.67/189,791.12 = 89,139.72/x
3. Step 3: Cross multiply
   126,506.67x = 189,791.12 × 89,139.72
4. Step 4: Simplify right side
   126,506.67x = 16,917,926,849.59
5. Step 5: Solve for x
   x = 16,917,926,849.59/126,506.67
6. Step 6: Final answer
   x = 133,731.50