Finding the Fourth Proportional to 2,978.85, 4,467.89 and 787.75

Step by Step Solution

1. Step 1: Write the proportion equation
   2,978.85 : 4,467.89 = 787.75 : x
2. Step 2: Convert to fraction form
   2,978.85/4,467.89 = 787.75/x
3. Step 3: Cross multiply
   2,978.85x = 4,467.89 × 787.75
4. Step 4: Simplify right side
   2,978.85x = 3,519,554.07
5. Step 5: Solve for x
   x = 3,519,554.07/2,978.85
6. Step 6: Final answer
   x = 1,181.52