Finding the Fourth Proportional to 48,042.72, 72,067.86 and 12,981.87

Step by Step Solution

1. Step 1: Write the proportion equation
   48,042.72 : 72,067.86 = 12,981.87 : x
2. Step 2: Convert to fraction form
   48,042.72/72,067.86 = 12,981.87/x
3. Step 3: Cross multiply
   48,042.72x = 72,067.86 × 12,981.87
4. Step 4: Simplify right side
   48,042.72x = 935,575,589.70
5. Step 5: Solve for x
   x = 935,575,589.70/48,042.72
6. Step 6: Final answer
   x = 19,473.83