Finding the Fourth Proportional to 1,641.78, 2,459.88 and 1,434.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,641.78 : 2,459.88 = 1,434.06 : x
2. Step 2: Convert to fraction form
   1,641.78/2,459.88 = 1,434.06/x
3. Step 3: Cross multiply
   1,641.78x = 2,459.88 × 1,434.06
4. Step 4: Simplify right side
   1,641.78x = 3,527,615.51
5. Step 5: Solve for x
   x = 3,527,615.51/1,641.78
6. Step 6: Final answer
   x = 2,148.65