Finding the Fourth Proportional to 10,720.78, 14,802.52 and 7,743.22

Step by Step Solution

1. Step 1: Write the proportion equation
   10,720.78 : 14,802.52 = 7,743.22 : x
2. Step 2: Convert to fraction form
   10,720.78/14,802.52 = 7,743.22/x
3. Step 3: Cross multiply
   10,720.78x = 14,802.52 × 7,743.22
4. Step 4: Simplify right side
   10,720.78x = 114,619,168.91
5. Step 5: Solve for x
   x = 114,619,168.91/10,720.78
6. Step 6: Final answer
   x = 10,691.31