Finding the Fourth Proportional to 1,642.72, 2,465.76 and 1,281.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,642.72 : 2,465.76 = 1,281.46 : x
2. Step 2: Convert to fraction form
   1,642.72/2,465.76 = 1,281.46/x
3. Step 3: Cross multiply
   1,642.72x = 2,465.76 × 1,281.46
4. Step 4: Simplify right side
   1,642.72x = 3,159,772.81
5. Step 5: Solve for x
   x = 3,159,772.81/1,642.72
6. Step 6: Final answer
   x = 1,923.50