Finding the Fourth Proportional to 1,568.34, 2,350.78 and 787.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,568.34 : 2,350.78 = 787.10 : x
2. Step 2: Convert to fraction form
   1,568.34/2,350.78 = 787.10/x
3. Step 3: Cross multiply
   1,568.34x = 2,350.78 × 787.10
4. Step 4: Simplify right side
   1,568.34x = 1,850,298.94
5. Step 5: Solve for x
   x = 1,850,298.94/1,568.34
6. Step 6: Final answer
   x = 1,179.78