Finding the Fourth Proportional to 1,662.66, 2,292.24 and 1,137.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,662.66 : 2,292.24 = 1,137.78 : x
2. Step 2: Convert to fraction form
   1,662.66/2,292.24 = 1,137.78/x
3. Step 3: Cross multiply
   1,662.66x = 2,292.24 × 1,137.78
4. Step 4: Simplify right side
   1,662.66x = 2,608,064.83
5. Step 5: Solve for x
   x = 2,608,064.83/1,662.66
6. Step 6: Final answer
   x = 1,568.61