Finding the Fourth Proportional to 59,620.81, 89,433.93 and 42,168.55

Step by Step Solution

1. Step 1: Write the proportion equation
   59,620.81 : 89,433.93 = 42,168.55 : x
2. Step 2: Convert to fraction form
   59,620.81/89,433.93 = 42,168.55/x
3. Step 3: Cross multiply
   59,620.81x = 89,433.93 × 42,168.55
4. Step 4: Simplify right side
   59,620.81x = 3,771,299,148.90
5. Step 5: Solve for x
   x = 3,771,299,148.90/59,620.81
6. Step 6: Final answer
   x = 63,254.75