Finding the Fourth Proportional to 443,654.72, 611,526.24 and 346,690.05

Step by Step Solution

1. Step 1: Write the proportion equation
   443,654.72 : 611,526.24 = 346,690.05 : x
2. Step 2: Convert to fraction form
   443,654.72/611,526.24 = 346,690.05/x
3. Step 3: Cross multiply
   443,654.72x = 611,526.24 × 346,690.05
4. Step 4: Simplify right side
   443,654.72x = 212,010,062,721.91
5. Step 5: Solve for x
   x = 212,010,062,721.91/443,654.72
6. Step 6: Final answer
   x = 477,871.76