Finding the Fourth Proportional to 13,698.31, 20,549.82 and 4,338.18

Step by Step Solution

1. Step 1: Write the proportion equation
   13,698.31 : 20,549.82 = 4,338.18 : x
2. Step 2: Convert to fraction form
   13,698.31/20,549.82 = 4,338.18/x
3. Step 3: Cross multiply
   13,698.31x = 20,549.82 × 4,338.18
4. Step 4: Simplify right side
   13,698.31x = 89,148,693.69
5. Step 5: Solve for x
   x = 89,148,693.69/13,698.31
6. Step 6: Final answer
   x = 6,508.01