Finding the Third Proportional to 402,308 and 863,030

Step by Step Solution

1. Step 1: Write the proportion equation
   402,308 : 863,030 = 863,030 : x
2. Step 2: Convert to fraction form
   402,308/863,030 = 863,030/x
3. Step 3: Cross multiply
   402,308x = 863,030 × 863,030
4. Step 4: Simplify right side
   402,308x = 744,820,780,900
5. Step 5: Solve for x
   x = 744,820,780,900/402,308
6. Step 6: Final answer
   x = 1,851,369.55