Finding the Fourth Proportional to 13,240.25, 18,272.06 and 7,272.17

Step by Step Solution

1. Step 1: Write the proportion equation
   13,240.25 : 18,272.06 = 7,272.17 : x
2. Step 2: Convert to fraction form
   13,240.25/18,272.06 = 7,272.17/x
3. Step 3: Cross multiply
   13,240.25x = 18,272.06 × 7,272.17
4. Step 4: Simplify right side
   13,240.25x = 132,877,535.89
5. Step 5: Solve for x
   x = 132,877,535.89/13,240.25
6. Step 6: Final answer
   x = 10,035.88