Finding the Fourth Proportional to 1,640.52, 2,462.58 and 1,225.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,640.52 : 2,462.58 = 1,225.56 : x
2. Step 2: Convert to fraction form
   1,640.52/2,462.58 = 1,225.56/x
3. Step 3: Cross multiply
   1,640.52x = 2,462.58 × 1,225.56
4. Step 4: Simplify right side
   1,640.52x = 3,018,039.54
5. Step 5: Solve for x
   x = 3,018,039.54/1,640.52
6. Step 6: Final answer
   x = 1,839.68