Finding the Fourth Proportional to 1,422.52, 1,962.38 and 1,225.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,422.52 : 1,962.38 = 1,225.69 : x
2. Step 2: Convert to fraction form
   1,422.52/1,962.38 = 1,225.69/x
3. Step 3: Cross multiply
   1,422.52x = 1,962.38 × 1,225.69
4. Step 4: Simplify right side
   1,422.52x = 2,405,267.70
5. Step 5: Solve for x
   x = 2,405,267.70/1,422.52
6. Step 6: Final answer
   x = 1,690.85