Finding the Fourth Proportional to 220,113.50, 303,764.13 and 123,321.43

Step by Step Solution

1. Step 1: Write the proportion equation
   220,113.50 : 303,764.13 = 123,321.43 : x
2. Step 2: Convert to fraction form
   220,113.50/303,764.13 = 123,321.43/x
3. Step 3: Cross multiply
   220,113.50x = 303,764.13 × 123,321.43
4. Step 4: Simplify right side
   220,113.50x = 37,460,626,894.31
5. Step 5: Solve for x
   x = 37,460,626,894.31/220,113.50
6. Step 6: Final answer
   x = 170,187.78