Finding the Fourth Proportional to 42,859.34, 64,249.63 and 14,772.72

Step by Step Solution

1. Step 1: Write the proportion equation
   42,859.34 : 64,249.63 = 14,772.72 : x
2. Step 2: Convert to fraction form
   42,859.34/64,249.63 = 14,772.72/x
3. Step 3: Cross multiply
   42,859.34x = 64,249.63 × 14,772.72
4. Step 4: Simplify right side
   42,859.34x = 949,141,757.16
5. Step 5: Solve for x
   x = 949,141,757.16/42,859.34
6. Step 6: Final answer
   x = 22,145.51