Finding the Fourth Proportional to 13,026.33, 17,974.31 and 7,720.29

Step by Step Solution

1. Step 1: Write the proportion equation
   13,026.33 : 17,974.31 = 7,720.29 : x
2. Step 2: Convert to fraction form
   13,026.33/17,974.31 = 7,720.29/x
3. Step 3: Cross multiply
   13,026.33x = 17,974.31 × 7,720.29
4. Step 4: Simplify right side
   13,026.33x = 138,766,847.15
5. Step 5: Solve for x
   x = 138,766,847.15/13,026.33
6. Step 6: Final answer
   x = 10,652.80