Finding the Fourth Proportional to 8,738.72, 12,056.56 and 5,378.08

Step by Step Solution

1. Step 1: Write the proportion equation
   8,738.72 : 12,056.56 = 5,378.08 : x
2. Step 2: Convert to fraction form
   8,738.72/12,056.56 = 5,378.08/x
3. Step 3: Cross multiply
   8,738.72x = 12,056.56 × 5,378.08
4. Step 4: Simplify right side
   8,738.72x = 64,841,144.20
5. Step 5: Solve for x
   x = 64,841,144.20/8,738.72
6. Step 6: Final answer
   x = 7,419.98