Finding the Fourth Proportional to 42,932.94, 64,399.59 and 15,211.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,932.94 : 64,399.59 = 15,211.50 : x
2. Step 2: Convert to fraction form
   42,932.94/64,399.59 = 15,211.50/x
3. Step 3: Cross multiply
   42,932.94x = 64,399.59 × 15,211.50
4. Step 4: Simplify right side
   42,932.94x = 979,614,363.29
5. Step 5: Solve for x
   x = 979,614,363.29/42,932.94
6. Step 6: Final answer
   x = 22,817.31