Finding the Fourth Proportional to 7,767.48, 10,720.57 and 7,292.72

Step by Step Solution

1. Step 1: Write the proportion equation
   7,767.48 : 10,720.57 = 7,292.72 : x
2. Step 2: Convert to fraction form
   7,767.48/10,720.57 = 7,292.72/x
3. Step 3: Cross multiply
   7,767.48x = 10,720.57 × 7,292.72
4. Step 4: Simplify right side
   7,767.48x = 78,182,115.25
5. Step 5: Solve for x
   x = 78,182,115.25/7,767.48
6. Step 6: Final answer
   x = 10,065.31