Finding the Fourth Proportional to 7,105.54, 10,660.50 and 2,947.50

Step by Step Solution

1. Step 1: Write the proportion equation
   7,105.54 : 10,660.50 = 2,947.50 : x
2. Step 2: Convert to fraction form
   7,105.54/10,660.50 = 2,947.50/x
3. Step 3: Cross multiply
   7,105.54x = 10,660.50 × 2,947.50
4. Step 4: Simplify right side
   7,105.54x = 31,421,823.75
5. Step 5: Solve for x
   x = 31,421,823.75/7,105.54
6. Step 6: Final answer
   x = 4,422.16