Finding the Fourth Proportional to 9,896.60, 14,919.77 and 9,360.78

Step by Step Solution

1. Step 1: Write the proportion equation
   9,896.60 : 14,919.77 = 9,360.78 : x
2. Step 2: Convert to fraction form
   9,896.60/14,919.77 = 9,360.78/x
3. Step 3: Cross multiply
   9,896.60x = 14,919.77 × 9,360.78
4. Step 4: Simplify right side
   9,896.60x = 139,660,637.82
5. Step 5: Solve for x
   x = 139,660,637.82/9,896.60
6. Step 6: Final answer
   x = 14,111.99