Finding the Third Proportional to 538,840 and 836,700

Step by Step Solution

1. Step 1: Write the proportion equation
   538,840 : 836,700 = 836,700 : x
2. Step 2: Convert to fraction form
   538,840/836,700 = 836,700/x
3. Step 3: Cross multiply
   538,840x = 836,700 × 836,700
4. Step 4: Simplify right side
   538,840x = 700,066,890,000
5. Step 5: Solve for x
   x = 700,066,890,000/538,840
6. Step 6: Final answer
   x = 1,299,211.06