Finding the Third Proportional to 686,590 and 1,503,972

Step by Step Solution

1. Step 1: Write the proportion equation
   686,590 : 1,503,972 = 1,503,972 : x
2. Step 2: Convert to fraction form
   686,590/1,503,972 = 1,503,972/x
3. Step 3: Cross multiply
   686,590x = 1,503,972 × 1,503,972
4. Step 4: Simplify right side
   686,590x = 2,261,931,776,784
5. Step 5: Solve for x
   x = 2,261,931,776,784/686,590
6. Step 6: Final answer
   x = 3,294,443.23