Finding the Fourth Proportional to 1,214.34, 1,672.02 and 1,017.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,214.34 : 1,672.02 = 1,017.42 : x
2. Step 2: Convert to fraction form
   1,214.34/1,672.02 = 1,017.42/x
3. Step 3: Cross multiply
   1,214.34x = 1,672.02 × 1,017.42
4. Step 4: Simplify right side
   1,214.34x = 1,701,146.59
5. Step 5: Solve for x
   x = 1,701,146.59/1,214.34
6. Step 6: Final answer
   x = 1,400.88