Finding the Fourth Proportional to 10,603.68, 15,908.40 and 3,678.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,603.68 : 15,908.40 = 3,678.72 : x
2. Step 2: Convert to fraction form
   10,603.68/15,908.40 = 3,678.72/x
3. Step 3: Cross multiply
   10,603.68x = 15,908.40 × 3,678.72
4. Step 4: Simplify right side
   10,603.68x = 58,522,549.25
5. Step 5: Solve for x
   x = 58,522,549.25/10,603.68
6. Step 6: Final answer
   x = 5,519.08