Finding the Third Proportional to 553,150 and 851,442

Step by Step Solution

1. Step 1: Write the proportion equation
   553,150 : 851,442 = 851,442 : x
2. Step 2: Convert to fraction form
   553,150/851,442 = 851,442/x
3. Step 3: Cross multiply
   553,150x = 851,442 × 851,442
4. Step 4: Simplify right side
   553,150x = 724,953,479,364
5. Step 5: Solve for x
   x = 724,953,479,364/553,150
6. Step 6: Final answer
   x = 1,310,591.12