Finding the Fourth Proportional to 221,105.72, 305,136.71 and 124,340.03

Step by Step Solution

1. Step 1: Write the proportion equation
   221,105.72 : 305,136.71 = 124,340.03 : x
2. Step 2: Convert to fraction form
   221,105.72/305,136.71 = 124,340.03/x
3. Step 3: Cross multiply
   221,105.72x = 305,136.71 × 124,340.03
4. Step 4: Simplify right side
   221,105.72x = 37,940,705,528.12
5. Step 5: Solve for x
   x = 37,940,705,528.12/221,105.72
6. Step 6: Final answer
   x = 171,595.32