Finding the Fourth Proportional to 17,972.80, 24,802.86 and 9,906.76

Step by Step Solution

1. Step 1: Write the proportion equation
   17,972.80 : 24,802.86 = 9,906.76 : x
2. Step 2: Convert to fraction form
   17,972.80/24,802.86 = 9,906.76/x
3. Step 3: Cross multiply
   17,972.80x = 24,802.86 × 9,906.76
4. Step 4: Simplify right side
   17,972.80x = 245,715,981.33
5. Step 5: Solve for x
   x = 245,715,981.33/17,972.80
6. Step 6: Final answer
   x = 13,671.55