Finding the Fourth Proportional to 21,629.10, 32,428.64 and 8,482.80

Step by Step Solution

1. Step 1: Write the proportion equation
   21,629.10 : 32,428.64 = 8,482.80 : x
2. Step 2: Convert to fraction form
   21,629.10/32,428.64 = 8,482.80/x
3. Step 3: Cross multiply
   21,629.10x = 32,428.64 × 8,482.80
4. Step 4: Simplify right side
   21,629.10x = 275,085,667.39
5. Step 5: Solve for x
   x = 275,085,667.39/21,629.10
6. Step 6: Final answer
   x = 12,718.31