Finding the Fourth Proportional to 21,080.82, 31,622.91 and 5,498.58

Step by Step Solution

1. Step 1: Write the proportion equation
   21,080.82 : 31,622.91 = 5,498.58 : x
2. Step 2: Convert to fraction form
   21,080.82/31,622.91 = 5,498.58/x
3. Step 3: Cross multiply
   21,080.82x = 31,622.91 × 5,498.58
4. Step 4: Simplify right side
   21,080.82x = 173,881,100.47
5. Step 5: Solve for x
   x = 173,881,100.47/21,080.82
6. Step 6: Final answer
   x = 8,248.31