Finding the Third Proportional to 642,239 and 1,381,354

Step by Step Solution

1. Step 1: Write the proportion equation
   642,239 : 1,381,354 = 1,381,354 : x
2. Step 2: Convert to fraction form
   642,239/1,381,354 = 1,381,354/x
3. Step 3: Cross multiply
   642,239x = 1,381,354 × 1,381,354
4. Step 4: Simplify right side
   642,239x = 1,908,138,873,316
5. Step 5: Solve for x
   x = 1,908,138,873,316/642,239
6. Step 6: Final answer
   x = 2,971,072.88