Finding the Fourth Proportional to 12,868.47, 17,761.25 and 7,834.35

Step by Step Solution

1. Step 1: Write the proportion equation
   12,868.47 : 17,761.25 = 7,834.35 : x
2. Step 2: Convert to fraction form
   12,868.47/17,761.25 = 7,834.35/x
3. Step 3: Cross multiply
   12,868.47x = 17,761.25 × 7,834.35
4. Step 4: Simplify right side
   12,868.47x = 139,147,848.94
5. Step 5: Solve for x
   x = 139,147,848.94/12,868.47
6. Step 6: Final answer
   x = 10,813.08