Finding the Third Proportional to 851,278 and 1,781,408

Step by Step Solution

1. Step 1: Write the proportion equation
   851,278 : 1,781,408 = 1,781,408 : x
2. Step 2: Convert to fraction form
   851,278/1,781,408 = 1,781,408/x
3. Step 3: Cross multiply
   851,278x = 1,781,408 × 1,781,408
4. Step 4: Simplify right side
   851,278x = 3,173,414,462,464
5. Step 5: Solve for x
   x = 3,173,414,462,464/851,278
6. Step 6: Final answer
   x = 3,727,823.89