Finding the Fourth Proportional to 158,091.30, 218,171.61 and 90,118.53

Step by Step Solution

1. Step 1: Write the proportion equation
   158,091.30 : 218,171.61 = 90,118.53 : x
2. Step 2: Convert to fraction form
   158,091.30/218,171.61 = 90,118.53/x
3. Step 3: Cross multiply
   158,091.30x = 218,171.61 × 90,118.53
4. Step 4: Simplify right side
   158,091.30x = 19,661,304,780.93
5. Step 5: Solve for x
   x = 19,661,304,780.93/158,091.30
6. Step 6: Final answer
   x = 124,366.77