Finding the Third Proportional to 728,279 and 1,139,956

Step by Step Solution

1. Step 1: Write the proportion equation
   728,279 : 1,139,956 = 1,139,956 : x
2. Step 2: Convert to fraction form
   728,279/1,139,956 = 1,139,956/x
3. Step 3: Cross multiply
   728,279x = 1,139,956 × 1,139,956
4. Step 4: Simplify right side
   728,279x = 1,299,499,681,936
5. Step 5: Solve for x
   x = 1,299,499,681,936/728,279
6. Step 6: Final answer
   x = 1,784,343.20