Finding the Fourth Proportional to 1,222,903.20, 1,687,638.06 and 679,061.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,222,903.20 : 1,687,638.06 = 679,061.92 : x
2. Step 2: Convert to fraction form
   1,222,903.20/1,687,638.06 = 679,061.92/x
3. Step 3: Cross multiply
   1,222,903.20x = 1,687,638.06 × 679,061.92
4. Step 4: Simplify right side
   1,222,903.20x = 1,146,010,741,288.68
5. Step 5: Solve for x
   x = 1,146,010,741,288.68/1,222,903.20
6. Step 6: Final answer
   x = 937,123.02