Finding the Fourth Proportional to 811,870.52, 1,217,673.50 and 272,365.56

Step by Step Solution

1. Step 1: Write the proportion equation
   811,870.52 : 1,217,673.50 = 272,365.56 : x
2. Step 2: Convert to fraction form
   811,870.52/1,217,673.50 = 272,365.56/x
3. Step 3: Cross multiply
   811,870.52x = 1,217,673.50 × 272,365.56
4. Step 4: Simplify right side
   811,870.52x = 331,652,323,362.83
5. Step 5: Solve for x
   x = 331,652,323,362.83/811,870.52
6. Step 6: Final answer
   x = 408,503.96