Finding the Third Proportional to 480,390 and 1,113,279

Step by Step Solution

1. Step 1: Write the proportion equation
   480,390 : 1,113,279 = 1,113,279 : x
2. Step 2: Convert to fraction form
   480,390/1,113,279 = 1,113,279/x
3. Step 3: Cross multiply
   480,390x = 1,113,279 × 1,113,279
4. Step 4: Simplify right side
   480,390x = 1,239,390,131,841
5. Step 5: Solve for x
   x = 1,239,390,131,841/480,390
6. Step 6: Final answer
   x = 2,579,966.55