Finding the Third Proportional to 691,600 and 1,431,200

Step by Step Solution

1. Step 1: Write the proportion equation
   691,600 : 1,431,200 = 1,431,200 : x
2. Step 2: Convert to fraction form
   691,600/1,431,200 = 1,431,200/x
3. Step 3: Cross multiply
   691,600x = 1,431,200 × 1,431,200
4. Step 4: Simplify right side
   691,600x = 2,048,333,440,000
5. Step 5: Solve for x
   x = 2,048,333,440,000/691,600
6. Step 6: Final answer
   x = 2,961,731.41