Finding the Fourth Proportional to 60,479.60, 90,734.73 and 42,745.15

Step by Step Solution

1. Step 1: Write the proportion equation
   60,479.60 : 90,734.73 = 42,745.15 : x
2. Step 2: Convert to fraction form
   60,479.60/90,734.73 = 42,745.15/x
3. Step 3: Cross multiply
   60,479.60x = 90,734.73 × 42,745.15
4. Step 4: Simplify right side
   60,479.60x = 3,878,469,417.22
5. Step 5: Solve for x
   x = 3,878,469,417.22/60,479.60
6. Step 6: Final answer
   x = 64,128.56