Finding the Fourth Proportional to 2,520.30, 3,779.91 and 787.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,520.30 : 3,779.91 = 787.98 : x
2. Step 2: Convert to fraction form
   2,520.30/3,779.91 = 787.98/x
3. Step 3: Cross multiply
   2,520.30x = 3,779.91 × 787.98
4. Step 4: Simplify right side
   2,520.30x = 2,978,493.48
5. Step 5: Solve for x
   x = 2,978,493.48/2,520.30
6. Step 6: Final answer
   x = 1,181.80