Finding the Fourth Proportional to 118,540.43, 163,585.78 and 64,825.49

Step by Step Solution

1. Step 1: Write the proportion equation
   118,540.43 : 163,585.78 = 64,825.49 : x
2. Step 2: Convert to fraction form
   118,540.43/163,585.78 = 64,825.49/x
3. Step 3: Cross multiply
   118,540.43x = 163,585.78 × 64,825.49
4. Step 4: Simplify right side
   118,540.43x = 10,604,528,345.53
5. Step 5: Solve for x
   x = 10,604,528,345.53/118,540.43
6. Step 6: Final answer
   x = 89,459.17