Finding the Fourth Proportional to 118,899.60, 164,080.80 and 65,186.88

Step by Step Solution

1. Step 1: Write the proportion equation
   118,899.60 : 164,080.80 = 65,186.88 : x
2. Step 2: Convert to fraction form
   118,899.60/164,080.80 = 65,186.88/x
3. Step 3: Cross multiply
   118,899.60x = 164,080.80 × 65,186.88
4. Step 4: Simplify right side
   118,899.60x = 10,695,915,419.90
5. Step 5: Solve for x
   x = 10,695,915,419.90/118,899.60
6. Step 6: Final answer
   x = 89,957.54