Finding the Fourth Proportional to 1,426.55, 1,967.76 and 902.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,426.55 : 1,967.76 = 902.57 : x
2. Step 2: Convert to fraction form
   1,426.55/1,967.76 = 902.57/x
3. Step 3: Cross multiply
   1,426.55x = 1,967.76 × 902.57
4. Step 4: Simplify right side
   1,426.55x = 1,776,031.30
5. Step 5: Solve for x
   x = 1,776,031.30/1,426.55
6. Step 6: Final answer
   x = 1,244.99