Finding the Third Proportional to 434,607 and 691,546.50

Step by Step Solution

1. Step 1: Write the proportion equation
   434,607 : 691,546.50 = 691,546.50 : x
2. Step 2: Convert to fraction form
   434,607/691,546.50 = 691,546.50/x
3. Step 3: Cross multiply
   434,607x = 691,546.50 × 691,546.50
4. Step 4: Simplify right side
   434,607x = 478,236,561,662.25
5. Step 5: Solve for x
   x = 478,236,561,662.25/434,607
6. Step 6: Final answer
   x = 1,100,388.54