Finding the Fourth Proportional to 1,287.42, 1,774.62 and 1,052.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,287.42 : 1,774.62 = 1,052.34 : x
2. Step 2: Convert to fraction form
   1,287.42/1,774.62 = 1,052.34/x
3. Step 3: Cross multiply
   1,287.42x = 1,774.62 × 1,052.34
4. Step 4: Simplify right side
   1,287.42x = 1,867,503.61
5. Step 5: Solve for x
   x = 1,867,503.61/1,287.42
6. Step 6: Final answer
   x = 1,450.58