Finding the Fourth Proportional to 28,150.91, 42,238.62 and 17,645

Step by Step Solution

1. Step 1: Write the proportion equation
   28,150.91 : 42,238.62 = 17,645 : x
2. Step 2: Convert to fraction form
   28,150.91/42,238.62 = 17,645/x
3. Step 3: Cross multiply
   28,150.91x = 42,238.62 × 17,645
4. Step 4: Simplify right side
   28,150.91x = 745,300,449.90
5. Step 5: Solve for x
   x = 745,300,449.90/28,150.91
6. Step 6: Final answer
   x = 26,475.18