Finding the Fourth Proportional to 2,039.28, 3,056.84 and 807.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,039.28 : 3,056.84 = 807.57 : x
2. Step 2: Convert to fraction form
   2,039.28/3,056.84 = 807.57/x
3. Step 3: Cross multiply
   2,039.28x = 3,056.84 × 807.57
4. Step 4: Simplify right side
   2,039.28x = 2,468,611.27
5. Step 5: Solve for x
   x = 2,468,611.27/2,039.28
6. Step 6: Final answer
   x = 1,210.53