Finding the Fourth Proportional to 400,393.72, 552,519.46 and 219,069.52

Step by Step Solution

1. Step 1: Write the proportion equation
   400,393.72 : 552,519.46 = 219,069.52 : x
2. Step 2: Convert to fraction form
   400,393.72/552,519.46 = 219,069.52/x
3. Step 3: Cross multiply
   400,393.72x = 552,519.46 × 219,069.52
4. Step 4: Simplify right side
   400,393.72x = 121,040,172,892.86
5. Step 5: Solve for x
   x = 121,040,172,892.86/400,393.72
6. Step 6: Final answer
   x = 302,302.88