Finding the Fourth Proportional to 42,958.69, 64,399.15 and 15,250.21

Step by Step Solution

1. Step 1: Write the proportion equation
   42,958.69 : 64,399.15 = 15,250.21 : x
2. Step 2: Convert to fraction form
   42,958.69/64,399.15 = 15,250.21/x
3. Step 3: Cross multiply
   42,958.69x = 64,399.15 × 15,250.21
4. Step 4: Simplify right side
   42,958.69x = 982,100,561.32
5. Step 5: Solve for x
   x = 982,100,561.32/42,958.69
6. Step 6: Final answer
   x = 22,861.51