Finding the Fourth Proportional to 123,503.50, 170,555.94 and 105,493.56

Step by Step Solution

1. Step 1: Write the proportion equation
   123,503.50 : 170,555.94 = 105,493.56 : x
2. Step 2: Convert to fraction form
   123,503.50/170,555.94 = 105,493.56/x
3. Step 3: Cross multiply
   123,503.50x = 170,555.94 × 105,493.56
4. Step 4: Simplify right side
   123,503.50x = 17,992,553,289.75
5. Step 5: Solve for x
   x = 17,992,553,289.75/123,503.50
6. Step 6: Final answer
   x = 145,684.56