Finding the Fourth Proportional to 10,648.74, 15,948.50 and 10,279.68

Step by Step Solution

1. Step 1: Write the proportion equation
   10,648.74 : 15,948.50 = 10,279.68 : x
2. Step 2: Convert to fraction form
   10,648.74/15,948.50 = 10,279.68/x
3. Step 3: Cross multiply
   10,648.74x = 15,948.50 × 10,279.68
4. Step 4: Simplify right side
   10,648.74x = 163,945,499.84
5. Step 5: Solve for x
   x = 163,945,499.84/10,648.74
6. Step 6: Final answer
   x = 15,395.76