Finding the Fourth Proportional to 11,870.24, 16,370.20 and 7,616.40

Step by Step Solution

1. Step 1: Write the proportion equation
   11,870.24 : 16,370.20 = 7,616.40 : x
2. Step 2: Convert to fraction form
   11,870.24/16,370.20 = 7,616.40/x
3. Step 3: Cross multiply
   11,870.24x = 16,370.20 × 7,616.40
4. Step 4: Simplify right side
   11,870.24x = 124,681,991.28
5. Step 5: Solve for x
   x = 124,681,991.28/11,870.24
6. Step 6: Final answer
   x = 10,503.75