Finding the Fourth Proportional to 17,721.85, 26,582.82 and 5,242.09

Step by Step Solution

1. Step 1: Write the proportion equation
   17,721.85 : 26,582.82 = 5,242.09 : x
2. Step 2: Convert to fraction form
   17,721.85/26,582.82 = 5,242.09/x
3. Step 3: Cross multiply
   17,721.85x = 26,582.82 × 5,242.09
4. Step 4: Simplify right side
   17,721.85x = 139,349,534.89
5. Step 5: Solve for x
   x = 139,349,534.89/17,721.85
6. Step 6: Final answer
   x = 7,863.15