Finding the Fourth Proportional to 2,666.17, 4,019.55 and 2,478.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,666.17 : 4,019.55 = 2,478.25 : x
2. Step 2: Convert to fraction form
   2,666.17/4,019.55 = 2,478.25/x
3. Step 3: Cross multiply
   2,666.17x = 4,019.55 × 2,478.25
4. Step 4: Simplify right side
   2,666.17x = 9,961,429.69
5. Step 5: Solve for x
   x = 9,961,429.69/2,666.17
6. Step 6: Final answer
   x = 3,736.24