Finding the Fourth Proportional to 28,109.18, 42,142.93 and 17,013.24

Step by Step Solution

1. Step 1: Write the proportion equation
   28,109.18 : 42,142.93 = 17,013.24 : x
2. Step 2: Convert to fraction form
   28,109.18/42,142.93 = 17,013.24/x
3. Step 3: Cross multiply
   28,109.18x = 42,142.93 × 17,013.24
4. Step 4: Simplify right side
   28,109.18x = 716,987,739.86
5. Step 5: Solve for x
   x = 716,987,739.86/28,109.18
6. Step 6: Final answer
   x = 25,507.24