Finding the Fourth Proportional to 7,017.72, 10,524.96 and 3,120

Step by Step Solution

1. Step 1: Write the proportion equation
   7,017.72 : 10,524.96 = 3,120 : x
2. Step 2: Convert to fraction form
   7,017.72/10,524.96 = 3,120/x
3. Step 3: Cross multiply
   7,017.72x = 10,524.96 × 3,120
4. Step 4: Simplify right side
   7,017.72x = 32,837,875.20
5. Step 5: Solve for x
   x = 32,837,875.20/7,017.72
6. Step 6: Final answer
   x = 4,679.28