Finding the Fourth Proportional to 118,320.50, 163,281.47 and 64,605.48

Step by Step Solution

1. Step 1: Write the proportion equation
   118,320.50 : 163,281.47 = 64,605.48 : x
2. Step 2: Convert to fraction form
   118,320.50/163,281.47 = 64,605.48/x
3. Step 3: Cross multiply
   118,320.50x = 163,281.47 × 64,605.48
4. Step 4: Simplify right side
   118,320.50x = 10,548,877,421.43
5. Step 5: Solve for x
   x = 10,548,877,421.43/118,320.50
6. Step 6: Final answer
   x = 89,155.12