Finding the Third Proportional to 477,209 and 1,029,139

Step by Step Solution

1. Step 1: Write the proportion equation
   477,209 : 1,029,139 = 1,029,139 : x
2. Step 2: Convert to fraction form
   477,209/1,029,139 = 1,029,139/x
3. Step 3: Cross multiply
   477,209x = 1,029,139 × 1,029,139
4. Step 4: Simplify right side
   477,209x = 1,059,127,081,321
5. Step 5: Solve for x
   x = 1,059,127,081,321/477,209
6. Step 6: Final answer
   x = 2,219,419.75