Finding the Fourth Proportional to 118,855.32, 164,021.63 and 65,139.18

Step by Step Solution

1. Step 1: Write the proportion equation
   118,855.32 : 164,021.63 = 65,139.18 : x
2. Step 2: Convert to fraction form
   118,855.32/164,021.63 = 65,139.18/x
3. Step 3: Cross multiply
   118,855.32x = 164,021.63 × 65,139.18
4. Step 4: Simplify right side
   118,855.32x = 10,684,234,154.77
5. Step 5: Solve for x
   x = 10,684,234,154.77/118,855.32
6. Step 6: Final answer
   x = 89,892.77