Finding the Fourth Proportional to 1,432.77, 1,976.52 and 902.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,432.77 : 1,976.52 = 902.31 : x
2. Step 2: Convert to fraction form
   1,432.77/1,976.52 = 902.31/x
3. Step 3: Cross multiply
   1,432.77x = 1,976.52 × 902.31
4. Step 4: Simplify right side
   1,432.77x = 1,783,433.76
5. Step 5: Solve for x
   x = 1,783,433.76/1,432.77
6. Step 6: Final answer
   x = 1,244.75