Finding the Fourth Proportional to 21,089.34, 31,631.58 and 5,508.18

Step by Step Solution

1. Step 1: Write the proportion equation
   21,089.34 : 31,631.58 = 5,508.18 : x
2. Step 2: Convert to fraction form
   21,089.34/31,631.58 = 5,508.18/x
3. Step 3: Cross multiply
   21,089.34x = 31,631.58 × 5,508.18
4. Step 4: Simplify right side
   21,089.34x = 174,232,436.32
5. Step 5: Solve for x
   x = 174,232,436.32/21,089.34
6. Step 6: Final answer
   x = 8,261.64