Finding the Fourth Proportional to 2,978.51, 4,467.68 and 787.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,978.51 : 4,467.68 = 787.25 : x
2. Step 2: Convert to fraction form
   2,978.51/4,467.68 = 787.25/x
3. Step 3: Cross multiply
   2,978.51x = 4,467.68 × 787.25
4. Step 4: Simplify right side
   2,978.51x = 3,517,188.31
5. Step 5: Solve for x
   x = 3,517,188.31/2,978.51
6. Step 6: Final answer
   x = 1,180.86