Finding the Fourth Proportional to 1,642.15, 2,266.37 and 1,083.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,642.15 : 2,266.37 = 1,083.78 : x
2. Step 2: Convert to fraction form
   1,642.15/2,266.37 = 1,083.78/x
3. Step 3: Cross multiply
   1,642.15x = 2,266.37 × 1,083.78
4. Step 4: Simplify right side
   1,642.15x = 2,456,250.46
5. Step 5: Solve for x
   x = 2,456,250.46/1,642.15
6. Step 6: Final answer
   x = 1,495.75