Finding the Fourth Proportional to 443,653.72, 611,524.86 and 346,689.05

Step by Step Solution

1. Step 1: Write the proportion equation
   443,653.72 : 611,524.86 = 346,689.05 : x
2. Step 2: Convert to fraction form
   443,653.72/611,524.86 = 346,689.05/x
3. Step 3: Cross multiply
   443,653.72x = 611,524.86 × 346,689.05
4. Step 4: Simplify right side
   443,653.72x = 212,008,972,764.78
5. Step 5: Solve for x
   x = 212,008,972,764.78/443,653.72
6. Step 6: Final answer
   x = 477,870.38