Finding the Fourth Proportional to 28,751.43, 43,112.56 and 13,155.69

Step by Step Solution

1. Step 1: Write the proportion equation
   28,751.43 : 43,112.56 = 13,155.69 : x
2. Step 2: Convert to fraction form
   28,751.43/43,112.56 = 13,155.69/x
3. Step 3: Cross multiply
   28,751.43x = 43,112.56 × 13,155.69
4. Step 4: Simplify right side
   28,751.43x = 567,175,474.47
5. Step 5: Solve for x
   x = 567,175,474.47/28,751.43
6. Step 6: Final answer
   x = 19,726.86