Finding the Fourth Proportional to 584,262, 806,281.56 and 315,990

Step by Step Solution

1. Step 1: Write the proportion equation
   584,262 : 806,281.56 = 315,990 : x
2. Step 2: Convert to fraction form
   584,262/806,281.56 = 315,990/x
3. Step 3: Cross multiply
   584,262x = 806,281.56 × 315,990
4. Step 4: Simplify right side
   584,262x = 254,776,910,144.40
5. Step 5: Solve for x
   x = 254,776,910,144.40/584,262
6. Step 6: Final answer
   x = 436,066.20