Finding the Fourth Proportional to 3,178.72, 4,775.40 and 3,047.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,178.72 : 4,775.40 = 3,047.50 : x
2. Step 2: Convert to fraction form
   3,178.72/4,775.40 = 3,047.50/x
3. Step 3: Cross multiply
   3,178.72x = 4,775.40 × 3,047.50
4. Step 4: Simplify right side
   3,178.72x = 14,553,031.50
5. Step 5: Solve for x
   x = 14,553,031.50/3,178.72
6. Step 6: Final answer
   x = 4,578.27