Finding the Fourth Proportional to 42,663.72, 64,005.88 and 16,009.92

Step by Step Solution

1. Step 1: Write the proportion equation
   42,663.72 : 64,005.88 = 16,009.92 : x
2. Step 2: Convert to fraction form
   42,663.72/64,005.88 = 16,009.92/x
3. Step 3: Cross multiply
   42,663.72x = 64,005.88 × 16,009.92
4. Step 4: Simplify right side
   42,663.72x = 1,024,729,018.33
5. Step 5: Solve for x
   x = 1,024,729,018.33/42,663.72
6. Step 6: Final answer
   x = 24,018.75