Finding the Fourth Proportional to 126,503.05, 189,785.72 and 89,136.10

Step by Step Solution

1. Step 1: Write the proportion equation
   126,503.05 : 189,785.72 = 89,136.10 : x
2. Step 2: Convert to fraction form
   126,503.05/189,785.72 = 89,136.10/x
3. Step 3: Cross multiply
   126,503.05x = 189,785.72 × 89,136.10
4. Step 4: Simplify right side
   126,503.05x = 16,916,757,807.63
5. Step 5: Solve for x
   x = 16,916,757,807.63/126,503.05
6. Step 6: Final answer
   x = 133,726.09