Finding the Fourth Proportional to 6,647.90, 9,174.50 and 3,663.72

Step by Step Solution

1. Step 1: Write the proportion equation
   6,647.90 : 9,174.50 = 3,663.72 : x
2. Step 2: Convert to fraction form
   6,647.90/9,174.50 = 3,663.72/x
3. Step 3: Cross multiply
   6,647.90x = 9,174.50 × 3,663.72
4. Step 4: Simplify right side
   6,647.90x = 33,612,780.82
5. Step 5: Solve for x
   x = 33,612,780.82/6,647.90
6. Step 6: Final answer
   x = 5,056.15