Finding the Fourth Proportional to 9,815.73, 14,720.23 and 5,311.86

Step by Step Solution

1. Step 1: Write the proportion equation
   9,815.73 : 14,720.23 = 5,311.86 : x
2. Step 2: Convert to fraction form
   9,815.73/14,720.23 = 5,311.86/x
3. Step 3: Cross multiply
   9,815.73x = 14,720.23 × 5,311.86
4. Step 4: Simplify right side
   9,815.73x = 78,191,800.93
5. Step 5: Solve for x
   x = 78,191,800.93/9,815.73
6. Step 6: Final answer
   x = 7,965.97