Finding the Fourth Proportional to 42,885.12, 59,202 and 28,568.78

Step by Step Solution

1. Step 1: Write the proportion equation
   42,885.12 : 59,202 = 28,568.78 : x
2. Step 2: Convert to fraction form
   42,885.12/59,202 = 28,568.78/x
3. Step 3: Cross multiply
   42,885.12x = 59,202 × 28,568.78
4. Step 4: Simplify right side
   42,885.12x = 1,691,328,617.55
5. Step 5: Solve for x
   x = 1,691,328,617.55/42,885.12
6. Step 6: Final answer
   x = 39,438.59