Finding the Fourth Proportional to 523,057.59, 721,701.72 and 308,217.69

Step by Step Solution

1. Step 1: Write the proportion equation
   523,057.59 : 721,701.72 = 308,217.69 : x
2. Step 2: Convert to fraction form
   523,057.59/721,701.72 = 308,217.69/x
3. Step 3: Cross multiply
   523,057.59x = 721,701.72 × 308,217.69
4. Step 4: Simplify right side
   523,057.59x = 222,441,237,007.43
5. Step 5: Solve for x
   x = 222,441,237,007.43/523,057.59
6. Step 6: Final answer
   x = 425,271.02