Finding the Fourth Proportional to 808,820, 1,116,171.60 and 451,124

Step by Step Solution

1. Step 1: Write the proportion equation
   808,820 : 1,116,171.60 = 451,124 : x
2. Step 2: Convert to fraction form
   808,820/1,116,171.60 = 451,124/x
3. Step 3: Cross multiply
   808,820x = 1,116,171.60 × 451,124
4. Step 4: Simplify right side
   808,820x = 503,531,796,878.40
5. Step 5: Solve for x
   x = 503,531,796,878.40/808,820
6. Step 6: Final answer
   x = 622,551.12