Finding the Fourth Proportional to 9,210.31, 13,806.17 and 5,260.26

Step by Step Solution

1. Step 1: Write the proportion equation
   9,210.31 : 13,806.17 = 5,260.26 : x
2. Step 2: Convert to fraction form
   9,210.31/13,806.17 = 5,260.26/x
3. Step 3: Cross multiply
   9,210.31x = 13,806.17 × 5,260.26
4. Step 4: Simplify right side
   9,210.31x = 72,624,118.59
5. Step 5: Solve for x
   x = 72,624,118.59/9,210.31
6. Step 6: Final answer
   x = 7,885.09