Finding the Fourth Proportional to 14,411.68, 21,570.54 and 7,821.52

Step by Step Solution

1. Step 1: Write the proportion equation
   14,411.68 : 21,570.54 = 7,821.52 : x
2. Step 2: Convert to fraction form
   14,411.68/21,570.54 = 7,821.52/x
3. Step 3: Cross multiply
   14,411.68x = 21,570.54 × 7,821.52
4. Step 4: Simplify right side
   14,411.68x = 168,714,410.02
5. Step 5: Solve for x
   x = 168,714,410.02/14,411.68
6. Step 6: Final answer
   x = 11,706.78