Finding the Fourth Proportional to 855,424.18, 1,180,780.30 and 492,992.72

Step by Step Solution

1. Step 1: Write the proportion equation
   855,424.18 : 1,180,780.30 = 492,992.72 : x
2. Step 2: Convert to fraction form
   855,424.18/1,180,780.30 = 492,992.72/x
3. Step 3: Cross multiply
   855,424.18x = 1,180,780.30 × 492,992.72
4. Step 4: Simplify right side
   855,424.18x = 582,116,091,819.42
5. Step 5: Solve for x
   x = 582,116,091,819.42/855,424.18
6. Step 6: Final answer
   x = 680,499.93