Finding the Fourth Proportional to 117,866.80, 162,654.78 and 64,151.20

Step by Step Solution

1. Step 1: Write the proportion equation
   117,866.80 : 162,654.78 = 64,151.20 : x
2. Step 2: Convert to fraction form
   117,866.80/162,654.78 = 64,151.20/x
3. Step 3: Cross multiply
   117,866.80x = 162,654.78 × 64,151.20
4. Step 4: Simplify right side
   117,866.80x = 10,434,499,322.74
5. Step 5: Solve for x
   x = 10,434,499,322.74/117,866.80
6. Step 6: Final answer
   x = 88,527.89