Finding the Fourth Proportional to 42,704.88, 58,915.80 and 28,535.28

Step by Step Solution

1. Step 1: Write the proportion equation
   42,704.88 : 58,915.80 = 28,535.28 : x
2. Step 2: Convert to fraction form
   42,704.88/58,915.80 = 28,535.28/x
3. Step 3: Cross multiply
   42,704.88x = 58,915.80 × 28,535.28
4. Step 4: Simplify right side
   42,704.88x = 1,681,178,849.42
5. Step 5: Solve for x
   x = 1,681,178,849.42/42,704.88
6. Step 6: Final answer
   x = 39,367.37