Finding the Fourth Proportional to 2,947.78, 4,423.50 and 1,715.74

Step by Step Solution

1. Step 1: Write the proportion equation
   2,947.78 : 4,423.50 = 1,715.74 : x
2. Step 2: Convert to fraction form
   2,947.78/4,423.50 = 1,715.74/x
3. Step 3: Cross multiply
   2,947.78x = 4,423.50 × 1,715.74
4. Step 4: Simplify right side
   2,947.78x = 7,589,575.89
5. Step 5: Solve for x
   x = 7,589,575.89/2,947.78
6. Step 6: Final answer
   x = 2,574.68