Finding the Fourth Proportional to 10,921.51, 16,380.17 and 3,524.18

Step by Step Solution

1. Step 1: Write the proportion equation
   10,921.51 : 16,380.17 = 3,524.18 : x
2. Step 2: Convert to fraction form
   10,921.51/16,380.17 = 3,524.18/x
3. Step 3: Cross multiply
   10,921.51x = 16,380.17 × 3,524.18
4. Step 4: Simplify right side
   10,921.51x = 57,726,649.89
5. Step 5: Solve for x
   x = 57,726,649.89/10,921.51
6. Step 6: Final answer
   x = 5,285.59