Finding the Fourth Proportional to 158,641.50, 218,921.27 and 90,654.15

Step by Step Solution

1. Step 1: Write the proportion equation
   158,641.50 : 218,921.27 = 90,654.15 : x
2. Step 2: Convert to fraction form
   158,641.50/218,921.27 = 90,654.15/x
3. Step 3: Cross multiply
   158,641.50x = 218,921.27 × 90,654.15
4. Step 4: Simplify right side
   158,641.50x = 19,846,121,195.50
5. Step 5: Solve for x
   x = 19,846,121,195.50/158,641.50
6. Step 6: Final answer
   x = 125,100.44