Finding the Fourth Proportional to 158,741.42, 219,065.88 and 87,128.12

Step by Step Solution

1. Step 1: Write the proportion equation
   158,741.42 : 219,065.88 = 87,128.12 : x
2. Step 2: Convert to fraction form
   158,741.42/219,065.88 = 87,128.12/x
3. Step 3: Cross multiply
   158,741.42x = 219,065.88 × 87,128.12
4. Step 4: Simplify right side
   158,741.42x = 19,086,798,280.55
5. Step 5: Solve for x
   x = 19,086,798,280.55/158,741.42
6. Step 6: Final answer
   x = 120,238.30