Finding the Fourth Proportional to 7,064.31, 9,748.82 and 3,920.50

Step by Step Solution

1. Step 1: Write the proportion equation
   7,064.31 : 9,748.82 = 3,920.50 : x
2. Step 2: Convert to fraction form
   7,064.31/9,748.82 = 3,920.50/x
3. Step 3: Cross multiply
   7,064.31x = 9,748.82 × 3,920.50
4. Step 4: Simplify right side
   7,064.31x = 38,220,248.81
5. Step 5: Solve for x
   x = 38,220,248.81/7,064.31
6. Step 6: Final answer
   x = 5,410.33