Finding the Fourth Proportional to 21,480.84, 32,199.72 and 10,216.35

Step by Step Solution

1. Step 1: Write the proportion equation
   21,480.84 : 32,199.72 = 10,216.35 : x
2. Step 2: Convert to fraction form
   21,480.84/32,199.72 = 10,216.35/x
3. Step 3: Cross multiply
   21,480.84x = 32,199.72 × 10,216.35
4. Step 4: Simplify right side
   21,480.84x = 328,963,609.42
5. Step 5: Solve for x
   x = 328,963,609.42/21,480.84
6. Step 6: Final answer
   x = 15,314.28