Finding the Fourth Proportional to 28,710.56, 43,044.72 and 8,978.08

Step by Step Solution

1. Step 1: Write the proportion equation
   28,710.56 : 43,044.72 = 8,978.08 : x
2. Step 2: Convert to fraction form
   28,710.56/43,044.72 = 8,978.08/x
3. Step 3: Cross multiply
   28,710.56x = 43,044.72 × 8,978.08
4. Step 4: Simplify right side
   28,710.56x = 386,458,939.74
5. Step 5: Solve for x
   x = 386,458,939.74/28,710.56
6. Step 6: Final answer
   x = 13,460.52