Finding the Fourth Proportional to 10,506.48, 15,748.72 and 3,929.76

Step by Step Solution

1. Step 1: Write the proportion equation
   10,506.48 : 15,748.72 = 3,929.76 : x
2. Step 2: Convert to fraction form
   10,506.48/15,748.72 = 3,929.76/x
3. Step 3: Cross multiply
   10,506.48x = 15,748.72 × 3,929.76
4. Step 4: Simplify right side
   10,506.48x = 61,888,689.91
5. Step 5: Solve for x
   x = 61,888,689.91/10,506.48
6. Step 6: Final answer
   x = 5,890.53