Finding the Third Proportional to 434,873 and 691,837.50

Step by Step Solution

1. Step 1: Write the proportion equation
   434,873 : 691,837.50 = 691,837.50 : x
2. Step 2: Convert to fraction form
   434,873/691,837.50 = 691,837.50/x
3. Step 3: Cross multiply
   434,873x = 691,837.50 × 691,837.50
4. Step 4: Simplify right side
   434,873x = 478,639,126,406.25
5. Step 5: Solve for x
   x = 478,639,126,406.25/434,873
6. Step 6: Final answer
   x = 1,100,641.17