Finding the Fourth Proportional to 559,538.73, 772,139.31 and 317,820.56

Step by Step Solution

1. Step 1: Write the proportion equation
   559,538.73 : 772,139.31 = 317,820.56 : x
2. Step 2: Convert to fraction form
   559,538.73/772,139.31 = 317,820.56/x
3. Step 3: Cross multiply
   559,538.73x = 772,139.31 × 317,820.56
4. Step 4: Simplify right side
   559,538.73x = 245,401,744,041.52
5. Step 5: Solve for x
   x = 245,401,744,041.52/559,538.73
6. Step 6: Final answer
   x = 438,578.66