Finding the Fourth Proportional to 1,691.41, 2,528.79 and 1,434.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,691.41 : 2,528.79 = 1,434.31 : x
2. Step 2: Convert to fraction form
   1,691.41/2,528.79 = 1,434.31/x
3. Step 3: Cross multiply
   1,691.41x = 2,528.79 × 1,434.31
4. Step 4: Simplify right side
   1,691.41x = 3,627,068.78
5. Step 5: Solve for x
   x = 3,627,068.78/1,691.41
6. Step 6: Final answer
   x = 2,144.41