Finding the Fourth Proportional to 1,426.84, 1,969.32 and 902.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,426.84 : 1,969.32 = 902.50 : x
2. Step 2: Convert to fraction form
   1,426.84/1,969.32 = 902.50/x
3. Step 3: Cross multiply
   1,426.84x = 1,969.32 × 902.50
4. Step 4: Simplify right side
   1,426.84x = 1,777,311.30
5. Step 5: Solve for x
   x = 1,777,311.30/1,426.84
6. Step 6: Final answer
   x = 1,245.63