Finding the Fourth Proportional to 2,056.84, 3,086.40 and 902.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,056.84 : 3,086.40 = 902.56 : x
2. Step 2: Convert to fraction form
   2,056.84/3,086.40 = 902.56/x
3. Step 3: Cross multiply
   2,056.84x = 3,086.40 × 902.56
4. Step 4: Simplify right side
   2,056.84x = 2,785,661.18
5. Step 5: Solve for x
   x = 2,785,661.18/2,056.84
6. Step 6: Final answer
   x = 1,354.34