Finding the Fourth Proportional to 813,848.20, 1,123,123.98 and 451,287.34

Step by Step Solution

1. Step 1: Write the proportion equation
   813,848.20 : 1,123,123.98 = 451,287.34 : x
2. Step 2: Convert to fraction form
   813,848.20/1,123,123.98 = 451,287.34/x
3. Step 3: Cross multiply
   813,848.20x = 1,123,123.98 × 451,287.34
4. Step 4: Simplify right side
   813,848.20x = 506,851,633,424.41
5. Step 5: Solve for x
   x = 506,851,633,424.41/813,848.20
6. Step 6: Final answer
   x = 622,784.00