Finding the Fourth Proportional to 7,109.72, 10,666.80 and 2,951.72

Step by Step Solution

1. Step 1: Write the proportion equation
   7,109.72 : 10,666.80 = 2,951.72 : x
2. Step 2: Convert to fraction form
   7,109.72/10,666.80 = 2,951.72/x
3. Step 3: Cross multiply
   7,109.72x = 10,666.80 × 2,951.72
4. Step 4: Simplify right side
   7,109.72x = 31,485,406.90
5. Step 5: Solve for x
   x = 31,485,406.90/7,109.72
6. Step 6: Final answer
   x = 4,428.50