Finding the Fourth Proportional to 109,561.50, 164,231.53 and 42,975.55

Step by Step Solution

1. Step 1: Write the proportion equation
   109,561.50 : 164,231.53 = 42,975.55 : x
2. Step 2: Convert to fraction form
   109,561.50/164,231.53 = 42,975.55/x
3. Step 3: Cross multiply
   109,561.50x = 164,231.53 × 42,975.55
4. Step 4: Simplify right side
   109,561.50x = 7,057,940,329.09
5. Step 5: Solve for x
   x = 7,057,940,329.09/109,561.50
6. Step 6: Final answer
   x = 64,419.90