Finding the Fourth Proportional to 118,478.16, 163,499.46 and 64,763.16

Step by Step Solution

1. Step 1: Write the proportion equation
   118,478.16 : 163,499.46 = 64,763.16 : x
2. Step 2: Convert to fraction form
   118,478.16/163,499.46 = 64,763.16/x
3. Step 3: Cross multiply
   118,478.16x = 163,499.46 × 64,763.16
4. Step 4: Simplify right side
   118,478.16x = 10,588,741,687.89
5. Step 5: Solve for x
   x = 10,588,741,687.89/118,478.16
6. Step 6: Final answer
   x = 89,372.94