Finding the Fourth Proportional to 1,642.78, 2,462.10 and 1,436.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,642.78 : 2,462.10 = 1,436.86 : x
2. Step 2: Convert to fraction form
   1,642.78/2,462.10 = 1,436.86/x
3. Step 3: Cross multiply
   1,642.78x = 2,462.10 × 1,436.86
4. Step 4: Simplify right side
   1,642.78x = 3,537,693.01
5. Step 5: Solve for x
   x = 3,537,693.01/1,642.78
6. Step 6: Final answer
   x = 2,153.48