Finding the Third Proportional to 691,312 and 1,066,448

Step by Step Solution

1. Step 1: Write the proportion equation
   691,312 : 1,066,448 = 1,066,448 : x
2. Step 2: Convert to fraction form
   691,312/1,066,448 = 1,066,448/x
3. Step 3: Cross multiply
   691,312x = 1,066,448 × 1,066,448
4. Step 4: Simplify right side
   691,312x = 1,137,311,336,704
5. Step 5: Solve for x
   x = 1,137,311,336,704/691,312
6. Step 6: Final answer
   x = 1,645,149.13