Finding the Fourth Proportional to 2,520.70, 3,781.16 and 877.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,520.70 : 3,781.16 = 877.37 : x
2. Step 2: Convert to fraction form
   2,520.70/3,781.16 = 877.37/x
3. Step 3: Cross multiply
   2,520.70x = 3,781.16 × 877.37
4. Step 4: Simplify right side
   2,520.70x = 3,317,488.00
5. Step 5: Solve for x
   x = 3,317,488.00/2,520.70
6. Step 6: Final answer
   x = 1,316.10