Finding the Fourth Proportional to 13,645.38, 20,459.00 and 5,326.17

Step by Step Solution

1. Step 1: Write the proportion equation
   13,645.38 : 20,459.00 = 5,326.17 : x
2. Step 2: Convert to fraction form
   13,645.38/20,459.00 = 5,326.17/x
3. Step 3: Cross multiply
   13,645.38x = 20,459.00 × 5,326.17
4. Step 4: Simplify right side
   13,645.38x = 108,968,085.40
5. Step 5: Solve for x
   x = 108,968,085.40/13,645.38
6. Step 6: Final answer
   x = 7,985.71