Finding the Fourth Proportional to 28,429.67, 42,614.51 and 10,648.72

Step by Step Solution

1. Step 1: Write the proportion equation
   28,429.67 : 42,614.51 = 10,648.72 : x
2. Step 2: Convert to fraction form
   28,429.67/42,614.51 = 10,648.72/x
3. Step 3: Cross multiply
   28,429.67x = 42,614.51 × 10,648.72
4. Step 4: Simplify right side
   28,429.67x = 453,790,044.85
5. Step 5: Solve for x
   x = 453,790,044.85/28,429.67
6. Step 6: Final answer
   x = 15,961.85