Finding the Fourth Proportional to 108,993.48, 163,423.31 and 42,355.79

Step by Step Solution

1. Step 1: Write the proportion equation
   108,993.48 : 163,423.31 = 42,355.79 : x
2. Step 2: Convert to fraction form
   108,993.48/163,423.31 = 42,355.79/x
3. Step 3: Cross multiply
   108,993.48x = 163,423.31 × 42,355.79
4. Step 4: Simplify right side
   108,993.48x = 6,921,923,399.46
5. Step 5: Solve for x
   x = 6,921,923,399.46/108,993.48
6. Step 6: Final answer
   x = 63,507.68