Finding the Fourth Proportional to 11,815.46, 17,726.27 and 4,420.50

Step by Step Solution

1. Step 1: Write the proportion equation
   11,815.46 : 17,726.27 = 4,420.50 : x
2. Step 2: Convert to fraction form
   11,815.46/17,726.27 = 4,420.50/x
3. Step 3: Cross multiply
   11,815.46x = 17,726.27 × 4,420.50
4. Step 4: Simplify right side
   11,815.46x = 78,358,865.80
5. Step 5: Solve for x
   x = 78,358,865.80/11,815.46
6. Step 6: Final answer
   x = 6,631.89