Finding the Fourth Proportional to 892,620.72, 1,231,825.32 and 490,212.72

Step by Step Solution

1. Step 1: Write the proportion equation
   892,620.72 : 1,231,825.32 = 490,212.72 : x
2. Step 2: Convert to fraction form
   892,620.72/1,231,825.32 = 490,212.72/x
3. Step 3: Cross multiply
   892,620.72x = 1,231,825.32 × 490,212.72
4. Step 4: Simplify right side
   892,620.72x = 603,856,440,682.07
5. Step 5: Solve for x
   x = 603,856,440,682.07/892,620.72
6. Step 6: Final answer
   x = 676,498.35