Finding the Fourth Proportional to 28,752.43, 43,114.06 and 13,156.69

Step by Step Solution

1. Step 1: Write the proportion equation
   28,752.43 : 43,114.06 = 13,156.69 : x
2. Step 2: Convert to fraction form
   28,752.43/43,114.06 = 13,156.69/x
3. Step 3: Cross multiply
   28,752.43x = 43,114.06 × 13,156.69
4. Step 4: Simplify right side
   28,752.43x = 567,238,322.06
5. Step 5: Solve for x
   x = 567,238,322.06/28,752.43
6. Step 6: Final answer
   x = 19,728.36