Finding the Fourth Proportional to 88,860.96, 122,508.72 and 86,109.12

Step by Step Solution

1. Step 1: Write the proportion equation
   88,860.96 : 122,508.72 = 86,109.12 : x
2. Step 2: Convert to fraction form
   88,860.96/122,508.72 = 86,109.12/x
3. Step 3: Cross multiply
   88,860.96x = 122,508.72 × 86,109.12
4. Step 4: Simplify right side
   88,860.96x = 10,549,118,071.53
5. Step 5: Solve for x
   x = 10,549,118,071.53/88,860.96
6. Step 6: Final answer
   x = 118,714.88