Finding the Fourth Proportional to 811,667.82, 1,120,102.90 and 449,106.96

Step by Step Solution

1. Step 1: Write the proportion equation
   811,667.82 : 1,120,102.90 = 449,106.96 : x
2. Step 2: Convert to fraction form
   811,667.82/1,120,102.90 = 449,106.96/x
3. Step 3: Cross multiply
   811,667.82x = 1,120,102.90 × 449,106.96
4. Step 4: Simplify right side
   811,667.82x = 503,046,008,306.18
5. Step 5: Solve for x
   x = 503,046,008,306.18/811,667.82
6. Step 6: Final answer
   x = 619,768.33