Finding the Fourth Proportional to 8,738.72, 12,055.32 and 5,199.92

Step by Step Solution

1. Step 1: Write the proportion equation
   8,738.72 : 12,055.32 = 5,199.92 : x
2. Step 2: Convert to fraction form
   8,738.72/12,055.32 = 5,199.92/x
3. Step 3: Cross multiply
   8,738.72x = 12,055.32 × 5,199.92
4. Step 4: Simplify right side
   8,738.72x = 62,686,699.57
5. Step 5: Solve for x
   x = 62,686,699.57/8,738.72
6. Step 6: Final answer
   x = 7,173.44