Finding the Fourth Proportional to 10,888.72, 15,021.84 and 7,256.35

Step by Step Solution

1. Step 1: Write the proportion equation
   10,888.72 : 15,021.84 = 7,256.35 : x
2. Step 2: Convert to fraction form
   10,888.72/15,021.84 = 7,256.35/x
3. Step 3: Cross multiply
   10,888.72x = 15,021.84 × 7,256.35
4. Step 4: Simplify right side
   10,888.72x = 109,003,728.68
5. Step 5: Solve for x
   x = 109,003,728.68/10,888.72
6. Step 6: Final answer
   x = 10,010.70