Finding the Fourth Proportional to 1,642.78, 2,461.38 and 1,435.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,642.78 : 2,461.38 = 1,435.06 : x
2. Step 2: Convert to fraction form
   1,642.78/2,461.38 = 1,435.06/x
3. Step 3: Cross multiply
   1,642.78x = 2,461.38 × 1,435.06
4. Step 4: Simplify right side
   1,642.78x = 3,532,227.98
5. Step 5: Solve for x
   x = 3,532,227.98/1,642.78
6. Step 6: Final answer
   x = 2,150.15