Finding the Fourth Proportional to 8,782.66, 12,116.67 and 5,419.63

Step by Step Solution

1. Step 1: Write the proportion equation
   8,782.66 : 12,116.67 = 5,419.63 : x
2. Step 2: Convert to fraction form
   8,782.66/12,116.67 = 5,419.63/x
3. Step 3: Cross multiply
   8,782.66x = 12,116.67 × 5,419.63
4. Step 4: Simplify right side
   8,782.66x = 65,667,807.65
5. Step 5: Solve for x
   x = 65,667,807.65/8,782.66
6. Step 6: Final answer
   x = 7,476.99