Finding the Fourth Proportional to 131,627.94, 181,513.89 and 99,441.78

Step by Step Solution

1. Step 1: Write the proportion equation
   131,627.94 : 181,513.89 = 99,441.78 : x
2. Step 2: Convert to fraction form
   131,627.94/181,513.89 = 99,441.78/x
3. Step 3: Cross multiply
   131,627.94x = 181,513.89 × 99,441.78
4. Step 4: Simplify right side
   131,627.94x = 18,050,064,316.32
5. Step 5: Solve for x
   x = 18,050,064,316.32/131,627.94
6. Step 6: Final answer
   x = 137,129.43