Finding the Fourth Proportional to 118,535.43, 163,578.89 and 64,820.49

Step by Step Solution

1. Step 1: Write the proportion equation
   118,535.43 : 163,578.89 = 64,820.49 : x
2. Step 2: Convert to fraction form
   118,535.43/163,578.89 = 64,820.49/x
3. Step 3: Cross multiply
   118,535.43x = 163,578.89 × 64,820.49
4. Step 4: Simplify right side
   118,535.43x = 10,603,263,352.09
5. Step 5: Solve for x
   x = 10,603,263,352.09/118,535.43
6. Step 6: Final answer
   x = 89,452.27