Finding the Fourth Proportional to 42,711.72, 64,023 and 14,623.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,711.72 : 64,023 = 14,623.50 : x
2. Step 2: Convert to fraction form
   42,711.72/64,023 = 14,623.50/x
3. Step 3: Cross multiply
   42,711.72x = 64,023 × 14,623.50
4. Step 4: Simplify right side
   42,711.72x = 936,240,340.50
5. Step 5: Solve for x
   x = 936,240,340.50/42,711.72
6. Step 6: Final answer
   x = 21,919.99