Finding the Fourth Proportional to 10,789.88, 14,898.48 and 8,438.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,789.88 : 14,898.48 = 8,438.72 : x
2. Step 2: Convert to fraction form
   10,789.88/14,898.48 = 8,438.72/x
3. Step 3: Cross multiply
   10,789.88x = 14,898.48 × 8,438.72
4. Step 4: Simplify right side
   10,789.88x = 125,724,101.15
5. Step 5: Solve for x
   x = 125,724,101.15/10,789.88
6. Step 6: Final answer
   x = 11,652.04