Finding the Fourth Proportional to 7,039.89, 9,715.35 and 3,896.07

Step by Step Solution

1. Step 1: Write the proportion equation
   7,039.89 : 9,715.35 = 3,896.07 : x
2. Step 2: Convert to fraction form
   7,039.89/9,715.35 = 3,896.07/x
3. Step 3: Cross multiply
   7,039.89x = 9,715.35 × 3,896.07
4. Step 4: Simplify right side
   7,039.89x = 37,851,683.67
5. Step 5: Solve for x
   x = 37,851,683.67/7,039.89
6. Step 6: Final answer
   x = 5,376.74