Finding the Fourth Proportional to 60,036.72, 90,022.68 and 42,540.72

Step by Step Solution

1. Step 1: Write the proportion equation
   60,036.72 : 90,022.68 = 42,540.72 : x
2. Step 2: Convert to fraction form
   60,036.72/90,022.68 = 42,540.72/x
3. Step 3: Cross multiply
   60,036.72x = 90,022.68 × 42,540.72
4. Step 4: Simplify right side
   60,036.72x = 3,829,629,623.53
5. Step 5: Solve for x
   x = 3,829,629,623.53/60,036.72
6. Step 6: Final answer
   x = 63,788.12