Finding the Fourth Proportional to 1,222,992.72, 1,687,697.28 and 679,114.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,222,992.72 : 1,687,697.28 = 679,114.32 : x
2. Step 2: Convert to fraction form
   1,222,992.72/1,687,697.28 = 679,114.32/x
3. Step 3: Cross multiply
   1,222,992.72x = 1,687,697.28 × 679,114.32
4. Step 4: Simplify right side
   1,222,992.72x = 1,146,139,390,673.05
5. Step 5: Solve for x
   x = 1,146,139,390,673.05/1,222,992.72
6. Step 6: Final answer
   x = 937,159.62