Finding the Fourth Proportional to 42,714.89, 64,061.25 and 12,722.12

Step by Step Solution

1. Step 1: Write the proportion equation
   42,714.89 : 64,061.25 = 12,722.12 : x
2. Step 2: Convert to fraction form
   42,714.89/64,061.25 = 12,722.12/x
3. Step 3: Cross multiply
   42,714.89x = 64,061.25 × 12,722.12
4. Step 4: Simplify right side
   42,714.89x = 814,994,589.54
5. Step 5: Solve for x
   x = 814,994,589.54/42,714.89
6. Step 6: Final answer
   x = 19,079.87