Finding the Fourth Proportional to 10,521.27, 15,766.86 and 7,726.01

Step by Step Solution

1. Step 1: Write the proportion equation
   10,521.27 : 15,766.86 = 7,726.01 : x
2. Step 2: Convert to fraction form
   10,521.27/15,766.86 = 7,726.01/x
3. Step 3: Cross multiply
   10,521.27x = 15,766.86 × 7,726.01
4. Step 4: Simplify right side
   10,521.27x = 121,814,918.03
5. Step 5: Solve for x
   x = 121,814,918.03/10,521.27
6. Step 6: Final answer
   x = 11,577.97