Finding the Fourth Proportional to 17,742.09, 26,608.59 and 5,259.20

Step by Step Solution

1. Step 1: Write the proportion equation
   17,742.09 : 26,608.59 = 5,259.20 : x
2. Step 2: Convert to fraction form
   17,742.09/26,608.59 = 5,259.20/x
3. Step 3: Cross multiply
   17,742.09x = 26,608.59 × 5,259.20
4. Step 4: Simplify right side
   17,742.09x = 139,939,778.28
5. Step 5: Solve for x
   x = 139,939,778.28/17,742.09
6. Step 6: Final answer
   x = 7,887.45