Finding the Fourth Proportional to 4,780.46, 7,167.89 and 1,447.72

Step by Step Solution

1. Step 1: Write the proportion equation
   4,780.46 : 7,167.89 = 1,447.72 : x
2. Step 2: Convert to fraction form
   4,780.46/7,167.89 = 1,447.72/x
3. Step 3: Cross multiply
   4,780.46x = 7,167.89 × 1,447.72
4. Step 4: Simplify right side
   4,780.46x = 10,377,097.71
5. Step 5: Solve for x
   x = 10,377,097.71/4,780.46
6. Step 6: Final answer
   x = 2,170.73