Finding the Fourth Proportional to 89,708.16, 122,900.73 and 86,345.04

Step by Step Solution

1. Step 1: Write the proportion equation
   89,708.16 : 122,900.73 = 86,345.04 : x
2. Step 2: Convert to fraction form
   89,708.16/122,900.73 = 86,345.04/x
3. Step 3: Cross multiply
   89,708.16x = 122,900.73 × 86,345.04
4. Step 4: Simplify right side
   89,708.16x = 10,611,868,447.88
5. Step 5: Solve for x
   x = 10,611,868,447.88/89,708.16
6. Step 6: Final answer
   x = 118,293.23