Finding the Fourth Proportional to 9,983.12, 13,776.66 and 5,507.15

Step by Step Solution

1. Step 1: Write the proportion equation
   9,983.12 : 13,776.66 = 5,507.15 : x
2. Step 2: Convert to fraction form
   9,983.12/13,776.66 = 5,507.15/x
3. Step 3: Cross multiply
   9,983.12x = 13,776.66 × 5,507.15
4. Step 4: Simplify right side
   9,983.12x = 75,870,064.24
5. Step 5: Solve for x
   x = 75,870,064.24/9,983.12
6. Step 6: Final answer
   x = 7,599.84