Finding the Fourth Proportional to 8,918.72, 13,375.76 and 4,238.56

Step by Step Solution

1. Step 1: Write the proportion equation
   8,918.72 : 13,375.76 = 4,238.56 : x
2. Step 2: Convert to fraction form
   8,918.72/13,375.76 = 4,238.56/x
3. Step 3: Cross multiply
   8,918.72x = 13,375.76 × 4,238.56
4. Step 4: Simplify right side
   8,918.72x = 56,693,961.31
5. Step 5: Solve for x
   x = 56,693,961.31/8,918.72
6. Step 6: Final answer
   x = 6,356.74