Finding the Fourth Proportional to 12,878.99, 17,774.30 and 7,843.52

Step by Step Solution

1. Step 1: Write the proportion equation
   12,878.99 : 17,774.30 = 7,843.52 : x
2. Step 2: Convert to fraction form
   12,878.99/17,774.30 = 7,843.52/x
3. Step 3: Cross multiply
   12,878.99x = 17,774.30 × 7,843.52
4. Step 4: Simplify right side
   12,878.99x = 139,413,077.54
5. Step 5: Solve for x
   x = 139,413,077.54/12,878.99
6. Step 6: Final answer
   x = 10,824.85