Finding the Fourth Proportional to 149,426.10, 206,115.89 and 91,255.55

Step by Step Solution

1. Step 1: Write the proportion equation
   149,426.10 : 206,115.89 = 91,255.55 : x
2. Step 2: Convert to fraction form
   149,426.10/206,115.89 = 91,255.55/x
3. Step 3: Cross multiply
   149,426.10x = 206,115.89 × 91,255.55
4. Step 4: Simplify right side
   149,426.10x = 18,809,217,418.83
5. Step 5: Solve for x
   x = 18,809,217,418.83/149,426.10
6. Step 6: Final answer
   x = 125,876.39