Finding the Fourth Proportional to 118,391.20, 163,382.27 and 64,679.69

Step by Step Solution

1. Step 1: Write the proportion equation
   118,391.20 : 163,382.27 = 64,679.69 : x
2. Step 2: Convert to fraction form
   118,391.20/163,382.27 = 64,679.69/x
3. Step 3: Cross multiply
   118,391.20x = 163,382.27 × 64,679.69
4. Step 4: Simplify right side
   118,391.20x = 10,567,514,575.10
5. Step 5: Solve for x
   x = 10,567,514,575.10/118,391.20
6. Step 6: Final answer
   x = 89,259.29