Finding the Fourth Proportional to 158,748.76, 219,077.32 and 87,128.16

Step by Step Solution

1. Step 1: Write the proportion equation
   158,748.76 : 219,077.32 = 87,128.16 : x
2. Step 2: Convert to fraction form
   158,748.76/219,077.32 = 87,128.16/x
3. Step 3: Cross multiply
   158,748.76x = 219,077.32 × 87,128.16
4. Step 4: Simplify right side
   158,748.76x = 19,087,803,789.33
5. Step 5: Solve for x
   x = 19,087,803,789.33/158,748.76
6. Step 6: Final answer
   x = 120,239.07