Finding the Fourth Proportional to 808,912, 1,116,298.56 and 451,216

Step by Step Solution

1. Step 1: Write the proportion equation
   808,912 : 1,116,298.56 = 451,216 : x
2. Step 2: Convert to fraction form
   808,912/1,116,298.56 = 451,216/x
3. Step 3: Cross multiply
   808,912x = 1,116,298.56 × 451,216
4. Step 4: Simplify right side
   808,912x = 503,691,771,048.96
5. Step 5: Solve for x
   x = 503,691,771,048.96/808,912
6. Step 6: Final answer
   x = 622,678.08