Finding the Fourth Proportional to 64,494.24, 89,008.56 and 39,358.56

Step by Step Solution

1. Step 1: Write the proportion equation
   64,494.24 : 89,008.56 = 39,358.56 : x
2. Step 2: Convert to fraction form
   64,494.24/89,008.56 = 39,358.56/x
3. Step 3: Cross multiply
   64,494.24x = 89,008.56 × 39,358.56
4. Step 4: Simplify right side
   64,494.24x = 3,503,248,749.27
5. Step 5: Solve for x
   x = 3,503,248,749.27/64,494.24
6. Step 6: Final answer
   x = 54,318.78