Finding the Fourth Proportional to 10,260.42, 15,401.57 and 9,888.63

Step by Step Solution

1. Step 1: Write the proportion equation
   10,260.42 : 15,401.57 = 9,888.63 : x
2. Step 2: Convert to fraction form
   10,260.42/15,401.57 = 9,888.63/x
3. Step 3: Cross multiply
   10,260.42x = 15,401.57 × 9,888.63
4. Step 4: Simplify right side
   10,260.42x = 152,300,377.71
5. Step 5: Solve for x
   x = 152,300,377.71/10,260.42
6. Step 6: Final answer
   x = 14,843.48