Finding the Fourth Proportional to 2,126.31, 3,190.56 and 877.83

Step by Step Solution

1. Step 1: Write the proportion equation
   2,126.31 : 3,190.56 = 877.83 : x
2. Step 2: Convert to fraction form
   2,126.31/3,190.56 = 877.83/x
3. Step 3: Cross multiply
   2,126.31x = 3,190.56 × 877.83
4. Step 4: Simplify right side
   2,126.31x = 2,800,764.90
5. Step 5: Solve for x
   x = 2,800,764.90/2,126.31
6. Step 6: Final answer
   x = 1,317.19