Finding the Fourth Proportional to 89,697.67, 122,886.41 and 86,334.55

Step by Step Solution

1. Step 1: Write the proportion equation
   89,697.67 : 122,886.41 = 86,334.55 : x
2. Step 2: Convert to fraction form
   89,697.67/122,886.41 = 86,334.55/x
3. Step 3: Cross multiply
   89,697.67x = 122,886.41 × 86,334.55
4. Step 4: Simplify right side
   89,697.67x = 10,609,342,908.47
5. Step 5: Solve for x
   x = 10,609,342,908.47/89,697.67
6. Step 6: Final answer
   x = 118,278.91