Finding the Fourth Proportional to 28,342.91, 42,264.31 and 28,089.96

Step by Step Solution

1. Step 1: Write the proportion equation
   28,342.91 : 42,264.31 = 28,089.96 : x
2. Step 2: Convert to fraction form
   28,342.91/42,264.31 = 28,089.96/x
3. Step 3: Cross multiply
   28,342.91x = 42,264.31 × 28,089.96
4. Step 4: Simplify right side
   28,342.91x = 1,187,202,707.10
5. Step 5: Solve for x
   x = 1,187,202,707.10/28,342.91
6. Step 6: Final answer
   x = 41,887.12