Finding the Fourth Proportional to 21,690.30, 32,546.34 and 8,552.10

Step by Step Solution

1. Step 1: Write the proportion equation
   21,690.30 : 32,546.34 = 8,552.10 : x
2. Step 2: Convert to fraction form
   21,690.30/32,546.34 = 8,552.10/x
3. Step 3: Cross multiply
   21,690.30x = 32,546.34 × 8,552.10
4. Step 4: Simplify right side
   21,690.30x = 278,339,554.31
5. Step 5: Solve for x
   x = 278,339,554.31/21,690.30
6. Step 6: Final answer
   x = 12,832.44