Finding the Fourth Proportional to 64,799.26, 89,404.34 and 42,171.55

Step by Step Solution

1. Step 1: Write the proportion equation
   64,799.26 : 89,404.34 = 42,171.55 : x
2. Step 2: Convert to fraction form
   64,799.26/89,404.34 = 42,171.55/x
3. Step 3: Cross multiply
   64,799.26x = 89,404.34 × 42,171.55
4. Step 4: Simplify right side
   64,799.26x = 3,770,320,078.18
5. Step 5: Solve for x
   x = 3,770,320,078.18/64,799.26
6. Step 6: Final answer
   x = 58,184.62