Finding the Fourth Proportional to 9,886.89, 14,831.94 and 3,655.77

Step by Step Solution

1. Step 1: Write the proportion equation
   9,886.89 : 14,831.94 = 3,655.77 : x
2. Step 2: Convert to fraction form
   9,886.89/14,831.94 = 3,655.77/x
3. Step 3: Cross multiply
   9,886.89x = 14,831.94 × 3,655.77
4. Step 4: Simplify right side
   9,886.89x = 54,222,161.29
5. Step 5: Solve for x
   x = 54,222,161.29/9,886.89
6. Step 6: Final answer
   x = 5,484.25