Finding the Fourth Proportional to 3,061.17, 4,223.83 and 2,115.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,061.17 : 4,223.83 = 2,115.50 : x
2. Step 2: Convert to fraction form
   3,061.17/4,223.83 = 2,115.50/x
3. Step 3: Cross multiply
   3,061.17x = 4,223.83 × 2,115.50
4. Step 4: Simplify right side
   3,061.17x = 8,935,489.92
5. Step 5: Solve for x
   x = 8,935,489.92/3,061.17
6. Step 6: Final answer
   x = 2,918.98