Finding the Fourth Proportional to 9,178.05, 13,767.60 and 2,603.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,178.05 : 13,767.60 = 2,603.72 : x
2. Step 2: Convert to fraction form
   9,178.05/13,767.60 = 2,603.72/x
3. Step 3: Cross multiply
   9,178.05x = 13,767.60 × 2,603.72
4. Step 4: Simplify right side
   9,178.05x = 35,847,009.89
5. Step 5: Solve for x
   x = 35,847,009.89/9,178.05
6. Step 6: Final answer
   x = 3,905.73