Finding the Fourth Proportional to 7,064.96, 9,748.80 and 3,920.72

Step by Step Solution

1. Step 1: Write the proportion equation
   7,064.96 : 9,748.80 = 3,920.72 : x
2. Step 2: Convert to fraction form
   7,064.96/9,748.80 = 3,920.72/x
3. Step 3: Cross multiply
   7,064.96x = 9,748.80 × 3,920.72
4. Step 4: Simplify right side
   7,064.96x = 38,222,315.14
5. Step 5: Solve for x
   x = 38,222,315.14/7,064.96
6. Step 6: Final answer
   x = 5,410.12