Finding the Fourth Proportional to 2,978.42, 4,467.12 and 787.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,978.42 : 4,467.12 = 787.37 : x
2. Step 2: Convert to fraction form
   2,978.42/4,467.12 = 787.37/x
3. Step 3: Cross multiply
   2,978.42x = 4,467.12 × 787.37
4. Step 4: Simplify right side
   2,978.42x = 3,517,282.76
5. Step 5: Solve for x
   x = 3,517,282.76/2,978.42
6. Step 6: Final answer
   x = 1,180.92