Finding the Fourth Proportional to 10,199.72, 15,300.34 and 5,266.28

Step by Step Solution

1. Step 1: Write the proportion equation
   10,199.72 : 15,300.34 = 5,266.28 : x
2. Step 2: Convert to fraction form
   10,199.72/15,300.34 = 5,266.28/x
3. Step 3: Cross multiply
   10,199.72x = 15,300.34 × 5,266.28
4. Step 4: Simplify right side
   10,199.72x = 80,575,874.54
5. Step 5: Solve for x
   x = 80,575,874.54/10,199.72
6. Step 6: Final answer
   x = 7,899.81