Finding the Fourth Proportional to 7,035.30, 9,707.31 and 3,890.88

Step by Step Solution

1. Step 1: Write the proportion equation
   7,035.30 : 9,707.31 = 3,890.88 : x
2. Step 2: Convert to fraction form
   7,035.30/9,707.31 = 3,890.88/x
3. Step 3: Cross multiply
   7,035.30x = 9,707.31 × 3,890.88
4. Step 4: Simplify right side
   7,035.30x = 37,769,978.33
5. Step 5: Solve for x
   x = 37,769,978.33/7,035.30
6. Step 6: Final answer
   x = 5,368.64