Finding the Fourth Proportional to 10,315.72, 14,235.61 and 5,599.90

Step by Step Solution

1. Step 1: Write the proportion equation
   10,315.72 : 14,235.61 = 5,599.90 : x
2. Step 2: Convert to fraction form
   10,315.72/14,235.61 = 5,599.90/x
3. Step 3: Cross multiply
   10,315.72x = 14,235.61 × 5,599.90
4. Step 4: Simplify right side
   10,315.72x = 79,717,992.44
5. Step 5: Solve for x
   x = 79,717,992.44/10,315.72
6. Step 6: Final answer
   x = 7,727.82