Finding the Third Proportional to 279,406.69 and 607,428.56

Step by Step Solution

1. Step 1: Write the proportion equation
   279,406.69 : 607,428.56 = 607,428.56 : x
2. Step 2: Convert to fraction form
   279,406.69/607,428.56 = 607,428.56/x
3. Step 3: Cross multiply
   279,406.69x = 607,428.56 × 607,428.56
4. Step 4: Simplify right side
   279,406.69x = 368,969,458,540.82
5. Step 5: Solve for x
   x = 368,969,458,540.82/279,406.69
6. Step 6: Final answer
   x = 1,320,546.27