Finding the Fourth Proportional to 42,260.88, 58,306.86 and 28,116.12

Step by Step Solution

1. Step 1: Write the proportion equation
   42,260.88 : 58,306.86 = 28,116.12 : x
2. Step 2: Convert to fraction form
   42,260.88/58,306.86 = 28,116.12/x
3. Step 3: Cross multiply
   42,260.88x = 58,306.86 × 28,116.12
4. Step 4: Simplify right side
   42,260.88x = 1,639,362,672.58
5. Step 5: Solve for x
   x = 1,639,362,672.58/42,260.88
6. Step 6: Final answer
   x = 38,791.49