Finding the Fourth Proportional to 12,888.52, 19,178.39 and 12,844.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,888.52 : 19,178.39 = 12,844.78 : x
2. Step 2: Convert to fraction form
   12,888.52/19,178.39 = 12,844.78/x
3. Step 3: Cross multiply
   12,888.52x = 19,178.39 × 12,844.78
4. Step 4: Simplify right side
   12,888.52x = 246,342,200.30
5. Step 5: Solve for x
   x = 246,342,200.30/12,888.52
6. Step 6: Final answer
   x = 19,113.30