Finding the Fourth Proportional to 3,670.29, 5,065.43 and 2,178.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,670.29 : 5,065.43 = 2,178.72 : x
2. Step 2: Convert to fraction form
   3,670.29/5,065.43 = 2,178.72/x
3. Step 3: Cross multiply
   3,670.29x = 5,065.43 × 2,178.72
4. Step 4: Simplify right side
   3,670.29x = 11,036,142.76
5. Step 5: Solve for x
   x = 11,036,142.76/3,670.29
6. Step 6: Final answer
   x = 3,006.89