Finding the Fourth Proportional to 3,061.17, 4,591.11 and 869.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,061.17 : 4,591.11 = 869.31 : x
2. Step 2: Convert to fraction form
   3,061.17/4,591.11 = 869.31/x
3. Step 3: Cross multiply
   3,061.17x = 4,591.11 × 869.31
4. Step 4: Simplify right side
   3,061.17x = 3,991,097.83
5. Step 5: Solve for x
   x = 3,991,097.83/3,061.17
6. Step 6: Final answer
   x = 1,303.78