Finding the Fourth Proportional to 42,822.96, 64,234.92 and 19,131.71

Step by Step Solution

1. Step 1: Write the proportion equation
   42,822.96 : 64,234.92 = 19,131.71 : x
2. Step 2: Convert to fraction form
   42,822.96/64,234.92 = 19,131.71/x
3. Step 3: Cross multiply
   42,822.96x = 64,234.92 × 19,131.71
4. Step 4: Simplify right side
   42,822.96x = 1,228,923,540.14
5. Step 5: Solve for x
   x = 1,228,923,540.14/42,822.96
6. Step 6: Final answer
   x = 28,697.77