Finding the Third Proportional to 185,068 and 398,200

Step by Step Solution

1. Step 1: Write the proportion equation
   185,068 : 398,200 = 398,200 : x
2. Step 2: Convert to fraction form
   185,068/398,200 = 398,200/x
3. Step 3: Cross multiply
   185,068x = 398,200 × 398,200
4. Step 4: Simplify right side
   185,068x = 158,563,240,000
5. Step 5: Solve for x
   x = 158,563,240,000/185,068
6. Step 6: Final answer
   x = 856,783.67