Finding the Fourth Proportional to 28,727.52, 43,112.88 and 13,156.08

Step by Step Solution

1. Step 1: Write the proportion equation
   28,727.52 : 43,112.88 = 13,156.08 : x
2. Step 2: Convert to fraction form
   28,727.52/43,112.88 = 13,156.08/x
3. Step 3: Cross multiply
   28,727.52x = 43,112.88 × 13,156.08
4. Step 4: Simplify right side
   28,727.52x = 567,196,498.31
5. Step 5: Solve for x
   x = 567,196,498.31/28,727.52
6. Step 6: Final answer
   x = 19,744.01