Finding the Fourth Proportional to 9,918.06, 13,686.92 and 5,726.32

Step by Step Solution

1. Step 1: Write the proportion equation
   9,918.06 : 13,686.92 = 5,726.32 : x
2. Step 2: Convert to fraction form
   9,918.06/13,686.92 = 5,726.32/x
3. Step 3: Cross multiply
   9,918.06x = 13,686.92 × 5,726.32
4. Step 4: Simplify right side
   9,918.06x = 78,375,683.73
5. Step 5: Solve for x
   x = 78,375,683.73/9,918.06
6. Step 6: Final answer
   x = 7,902.32