Finding the Fourth Proportional to 21,675.72, 32,494.12 and 7,821.48

Step by Step Solution

1. Step 1: Write the proportion equation
   21,675.72 : 32,494.12 = 7,821.48 : x
2. Step 2: Convert to fraction form
   21,675.72/32,494.12 = 7,821.48/x
3. Step 3: Cross multiply
   21,675.72x = 32,494.12 × 7,821.48
4. Step 4: Simplify right side
   21,675.72x = 254,152,109.70
5. Step 5: Solve for x
   x = 254,152,109.70/21,675.72
6. Step 6: Final answer
   x = 11,725.20