Finding the Third Proportional to 851,778 and 1,876,390

Step by Step Solution

1. Step 1: Write the proportion equation
   851,778 : 1,876,390 = 1,876,390 : x
2. Step 2: Convert to fraction form
   851,778/1,876,390 = 1,876,390/x
3. Step 3: Cross multiply
   851,778x = 1,876,390 × 1,876,390
4. Step 4: Simplify right side
   851,778x = 3,520,839,432,100
5. Step 5: Solve for x
   x = 3,520,839,432,100/851,778
6. Step 6: Final answer
   x = 4,133,517.69