Finding the Fourth Proportional to 10,434.89, 15,559.25 and 9,275.78

Step by Step Solution

1. Step 1: Write the proportion equation
   10,434.89 : 15,559.25 = 9,275.78 : x
2. Step 2: Convert to fraction form
   10,434.89/15,559.25 = 9,275.78/x
3. Step 3: Cross multiply
   10,434.89x = 15,559.25 × 9,275.78
4. Step 4: Simplify right side
   10,434.89x = 144,324,055.79
5. Step 5: Solve for x
   x = 144,324,055.79/10,434.89
6. Step 6: Final answer
   x = 13,830.92