Finding the Fourth Proportional to 42,908.50, 64,301.41 and 18,864.01

Step by Step Solution

1. Step 1: Write the proportion equation
   42,908.50 : 64,301.41 = 18,864.01 : x
2. Step 2: Convert to fraction form
   42,908.50/64,301.41 = 18,864.01/x
3. Step 3: Cross multiply
   42,908.50x = 64,301.41 × 18,864.01
4. Step 4: Simplify right side
   42,908.50x = 1,212,982,441.25
5. Step 5: Solve for x
   x = 1,212,982,441.25/42,908.50
6. Step 6: Final answer
   x = 28,269.05