Finding the Fourth Proportional to 2,520.55, 3,779.61 and 877.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,520.55 : 3,779.61 = 877.06 : x
2. Step 2: Convert to fraction form
   2,520.55/3,779.61 = 877.06/x
3. Step 3: Cross multiply
   2,520.55x = 3,779.61 × 877.06
4. Step 4: Simplify right side
   2,520.55x = 3,314,944.75
5. Step 5: Solve for x
   x = 3,314,944.75/2,520.55
6. Step 6: Final answer
   x = 1,315.17