Finding the Third Proportional to 686,880 and 1,010,430

Step by Step Solution

1. Step 1: Write the proportion equation
   686,880 : 1,010,430 = 1,010,430 : x
2. Step 2: Convert to fraction form
   686,880/1,010,430 = 1,010,430/x
3. Step 3: Cross multiply
   686,880x = 1,010,430 × 1,010,430
4. Step 4: Simplify right side
   686,880x = 1,020,968,784,900
5. Step 5: Solve for x
   x = 1,020,968,784,900/686,880
6. Step 6: Final answer
   x = 1,486,385.96