Finding the Fourth Proportional to 42,456.06, 63,695.61 and 12,874.86

Step by Step Solution

1. Step 1: Write the proportion equation
   42,456.06 : 63,695.61 = 12,874.86 : x
2. Step 2: Convert to fraction form
   42,456.06/63,695.61 = 12,874.86/x
3. Step 3: Cross multiply
   42,456.06x = 63,695.61 × 12,874.86
4. Step 4: Simplify right side
   42,456.06x = 820,072,061.36
5. Step 5: Solve for x
   x = 820,072,061.36/42,456.06
6. Step 6: Final answer
   x = 19,315.78