Finding the Fourth Proportional to 572,429.64, 789,913.32 and 317,760.72

Step by Step Solution

1. Step 1: Write the proportion equation
   572,429.64 : 789,913.32 = 317,760.72 : x
2. Step 2: Convert to fraction form
   572,429.64/789,913.32 = 317,760.72/x
3. Step 3: Cross multiply
   572,429.64x = 789,913.32 × 317,760.72
4. Step 4: Simplify right side
   572,429.64x = 251,003,425,300.79
5. Step 5: Solve for x
   x = 251,003,425,300.79/572,429.64
6. Step 6: Final answer
   x = 438,487.82