Finding the Fourth Proportional to 215,987.50, 298,061.89 and 120,494.08

Step by Step Solution

1. Step 1: Write the proportion equation
   215,987.50 : 298,061.89 = 120,494.08 : x
2. Step 2: Convert to fraction form
   215,987.50/298,061.89 = 120,494.08/x
3. Step 3: Cross multiply
   215,987.50x = 298,061.89 × 120,494.08
4. Step 4: Simplify right side
   215,987.50x = 35,914,693,218.61
5. Step 5: Solve for x
   x = 35,914,693,218.61/215,987.50
6. Step 6: Final answer
   x = 166,281.35