Finding the Fourth Proportional to 12,838.40, 17,718.24 and 7,801.52

Step by Step Solution

1. Step 1: Write the proportion equation
   12,838.40 : 17,718.24 = 7,801.52 : x
2. Step 2: Convert to fraction form
   12,838.40/17,718.24 = 7,801.52/x
3. Step 3: Cross multiply
   12,838.40x = 17,718.24 × 7,801.52
4. Step 4: Simplify right side
   12,838.40x = 138,229,203.72
5. Step 5: Solve for x
   x = 138,229,203.72/12,838.40
6. Step 6: Final answer
   x = 10,766.86