Finding the Fourth Proportional to 89,775.68, 122,992.17 and 86,410.43

Step by Step Solution

1. Step 1: Write the proportion equation
   89,775.68 : 122,992.17 = 86,410.43 : x
2. Step 2: Convert to fraction form
   89,775.68/122,992.17 = 86,410.43/x
3. Step 3: Cross multiply
   89,775.68x = 122,992.17 × 86,410.43
4. Step 4: Simplify right side
   89,775.68x = 10,627,806,296.33
5. Step 5: Solve for x
   x = 10,627,806,296.33/89,775.68
6. Step 6: Final answer
   x = 118,381.80