Finding the Third Proportional to 691,392 and 1,066,590

Step by Step Solution

1. Step 1: Write the proportion equation
   691,392 : 1,066,590 = 1,066,590 : x
2. Step 2: Convert to fraction form
   691,392/1,066,590 = 1,066,590/x
3. Step 3: Cross multiply
   691,392x = 1,066,590 × 1,066,590
4. Step 4: Simplify right side
   691,392x = 1,137,614,228,100
5. Step 5: Solve for x
   x = 1,137,614,228,100/691,392
6. Step 6: Final answer
   x = 1,645,396.86