Finding the Fourth Proportional to 563,139.92, 777,188.82 and 321,458.82

Step by Step Solution

1. Step 1: Write the proportion equation
   563,139.92 : 777,188.82 = 321,458.82 : x
2. Step 2: Convert to fraction form
   563,139.92/777,188.82 = 321,458.82/x
3. Step 3: Cross multiply
   563,139.92x = 777,188.82 × 321,458.82
4. Step 4: Simplify right side
   563,139.92x = 249,834,200,994.39
5. Step 5: Solve for x
   x = 249,834,200,994.39/563,139.92
6. Step 6: Final answer
   x = 443,644.99