Finding the Fourth Proportional to 12,886.52, 19,175.41 and 12,842.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,886.52 : 19,175.41 = 12,842.78 : x
2. Step 2: Convert to fraction form
   12,886.52/19,175.41 = 12,842.78/x
3. Step 3: Cross multiply
   12,886.52x = 19,175.41 × 12,842.78
4. Step 4: Simplify right side
   12,886.52x = 246,265,492.22
5. Step 5: Solve for x
   x = 246,265,492.22/12,886.52
6. Step 6: Final answer
   x = 19,110.33