Finding the Fourth Proportional to 10,875.66, 16,315.89 and 3,480.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,875.66 : 16,315.89 = 3,480.72 : x
2. Step 2: Convert to fraction form
   10,875.66/16,315.89 = 3,480.72/x
3. Step 3: Cross multiply
   10,875.66x = 16,315.89 × 3,480.72
4. Step 4: Simplify right side
   10,875.66x = 56,791,044.64
5. Step 5: Solve for x
   x = 56,791,044.64/10,875.66
6. Step 6: Final answer
   x = 5,221.85