Finding the Fourth Proportional to 13,026.22, 17,969.01 and 7,720.06

Step by Step Solution

1. Step 1: Write the proportion equation
   13,026.22 : 17,969.01 = 7,720.06 : x
2. Step 2: Convert to fraction form
   13,026.22/17,969.01 = 7,720.06/x
3. Step 3: Cross multiply
   13,026.22x = 17,969.01 × 7,720.06
4. Step 4: Simplify right side
   13,026.22x = 138,721,835.34
5. Step 5: Solve for x
   x = 138,721,835.34/13,026.22
6. Step 6: Final answer
   x = 10,649.43