Finding the Fourth Proportional to 7,064.30, 9,749.31 and 3,921.50

Step by Step Solution

1. Step 1: Write the proportion equation
   7,064.30 : 9,749.31 = 3,921.50 : x
2. Step 2: Convert to fraction form
   7,064.30/9,749.31 = 3,921.50/x
3. Step 3: Cross multiply
   7,064.30x = 9,749.31 × 3,921.50
4. Step 4: Simplify right side
   7,064.30x = 38,231,919.17
5. Step 5: Solve for x
   x = 38,231,919.17/7,064.30
6. Step 6: Final answer
   x = 5,411.99