Finding the Fourth Proportional to 223,220.72, 308,046.72 and 122,618.72

Step by Step Solution

1. Step 1: Write the proportion equation
   223,220.72 : 308,046.72 = 122,618.72 : x
2. Step 2: Convert to fraction form
   223,220.72/308,046.72 = 122,618.72/x
3. Step 3: Cross multiply
   223,220.72x = 308,046.72 × 122,618.72
4. Step 4: Simplify right side
   223,220.72x = 37,772,294,506.60
5. Step 5: Solve for x
   x = 37,772,294,506.60/223,220.72
6. Step 6: Final answer
   x = 169,215.00