Finding the Fourth Proportional to 158,729.86, 219,046.59 and 87,111.10

Step by Step Solution

1. Step 1: Write the proportion equation
   158,729.86 : 219,046.59 = 87,111.10 : x
2. Step 2: Convert to fraction form
   158,729.86/219,046.59 = 87,111.10/x
3. Step 3: Cross multiply
   158,729.86x = 219,046.59 × 87,111.10
4. Step 4: Simplify right side
   158,729.86x = 19,081,389,406.15
5. Step 5: Solve for x
   x = 19,081,389,406.15/158,729.86
6. Step 6: Final answer
   x = 120,212.98