Finding the Fourth Proportional to 129,588.94, 178,892.76 and 91,379.62

Step by Step Solution

1. Step 1: Write the proportion equation
   129,588.94 : 178,892.76 = 91,379.62 : x
2. Step 2: Convert to fraction form
   129,588.94/178,892.76 = 91,379.62/x
3. Step 3: Cross multiply
   129,588.94x = 178,892.76 × 91,379.62
4. Step 4: Simplify right side
   129,588.94x = 16,347,152,429.55
5. Step 5: Solve for x
   x = 16,347,152,429.55/129,588.94
6. Step 6: Final answer
   x = 126,146.20