Finding the Fourth Proportional to 118,431.55, 163,433.56 and 64,715.33

Step by Step Solution

1. Step 1: Write the proportion equation
   118,431.55 : 163,433.56 = 64,715.33 : x
2. Step 2: Convert to fraction form
   118,431.55/163,433.56 = 64,715.33/x
3. Step 3: Cross multiply
   118,431.55x = 163,433.56 × 64,715.33
4. Step 4: Simplify right side
   118,431.55x = 10,576,656,768.47
5. Step 5: Solve for x
   x = 10,576,656,768.47/118,431.55
6. Step 6: Final answer
   x = 89,306.07