Finding the Fourth Proportional to 22,618.10, 31,223.67 and 15,077

Step by Step Solution

1. Step 1: Write the proportion equation
   22,618.10 : 31,223.67 = 15,077 : x
2. Step 2: Convert to fraction form
   22,618.10/31,223.67 = 15,077/x
3. Step 3: Cross multiply
   22,618.10x = 31,223.67 × 15,077
4. Step 4: Simplify right side
   22,618.10x = 470,759,272.59
5. Step 5: Solve for x
   x = 470,759,272.59/22,618.10
6. Step 6: Final answer
   x = 20,813.39