Finding the Fourth Proportional to 342,174.48, 472,043.82 and 221,354.72

Step by Step Solution

1. Step 1: Write the proportion equation
   342,174.48 : 472,043.82 = 221,354.72 : x
2. Step 2: Convert to fraction form
   342,174.48/472,043.82 = 221,354.72/x
3. Step 3: Cross multiply
   342,174.48x = 472,043.82 × 221,354.72
4. Step 4: Simplify right side
   342,174.48x = 104,489,130,499.10
5. Step 5: Solve for x
   x = 104,489,130,499.10/342,174.48
6. Step 6: Final answer
   x = 305,367.99