Finding the Fourth Proportional to 12,977.78, 19,488.52 and 12,875.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,977.78 : 19,488.52 = 12,875.72 : x
2. Step 2: Convert to fraction form
   12,977.78/19,488.52 = 12,875.72/x
3. Step 3: Cross multiply
   12,977.78x = 19,488.52 × 12,875.72
4. Step 4: Simplify right side
   12,977.78x = 250,928,726.73
5. Step 5: Solve for x
   x = 250,928,726.73/12,977.78
6. Step 6: Final answer
   x = 19,335.26