Finding the Fourth Proportional to 17,085.90, 25,632.45 and 7,220.10

Step by Step Solution

1. Step 1: Write the proportion equation
   17,085.90 : 25,632.45 = 7,220.10 : x
2. Step 2: Convert to fraction form
   17,085.90/25,632.45 = 7,220.10/x
3. Step 3: Cross multiply
   17,085.90x = 25,632.45 × 7,220.10
4. Step 4: Simplify right side
   17,085.90x = 185,068,852.25
5. Step 5: Solve for x
   x = 185,068,852.25/17,085.90
6. Step 6: Final answer
   x = 10,831.67