Finding the Third Proportional to 687,234 and 1,045,431

Step by Step Solution

1. Step 1: Write the proportion equation
   687,234 : 1,045,431 = 1,045,431 : x
2. Step 2: Convert to fraction form
   687,234/1,045,431 = 1,045,431/x
3. Step 3: Cross multiply
   687,234x = 1,045,431 × 1,045,431
4. Step 4: Simplify right side
   687,234x = 1,092,925,975,761
5. Step 5: Solve for x
   x = 1,092,925,975,761/687,234
6. Step 6: Final answer
   x = 1,590,325.82