Finding the Fourth Proportional to 21,510.96, 32,268.56 and 8,364.40

Step by Step Solution

1. Step 1: Write the proportion equation
   21,510.96 : 32,268.56 = 8,364.40 : x
2. Step 2: Convert to fraction form
   21,510.96/32,268.56 = 8,364.40/x
3. Step 3: Cross multiply
   21,510.96x = 32,268.56 × 8,364.40
4. Step 4: Simplify right side
   21,510.96x = 269,907,143.26
5. Step 5: Solve for x
   x = 269,907,143.26/21,510.96
6. Step 6: Final answer
   x = 12,547.42