Finding the Fourth Proportional to 892,608.72, 1,231,808.76 and 490,200.72

Step by Step Solution

1. Step 1: Write the proportion equation
   892,608.72 : 1,231,808.76 = 490,200.72 : x
2. Step 2: Convert to fraction form
   892,608.72/1,231,808.76 = 490,200.72/x
3. Step 3: Cross multiply
   892,608.72x = 1,231,808.76 × 490,200.72
4. Step 4: Simplify right side
   892,608.72x = 603,833,541,054.31
5. Step 5: Solve for x
   x = 603,833,541,054.31/892,608.72
6. Step 6: Final answer
   x = 676,481.79