Finding the Fourth Proportional to 10,665.12, 15,994.08 and 3,738.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,665.12 : 15,994.08 = 3,738.72 : x
2. Step 2: Convert to fraction form
   10,665.12/15,994.08 = 3,738.72/x
3. Step 3: Cross multiply
   10,665.12x = 15,994.08 × 3,738.72
4. Step 4: Simplify right side
   10,665.12x = 59,797,386.78
5. Step 5: Solve for x
   x = 59,797,386.78/10,665.12
6. Step 6: Final answer
   x = 5,606.82