Finding the Third Proportional to 437,691 and 661,072.50

Step by Step Solution

1. Step 1: Write the proportion equation
   437,691 : 661,072.50 = 661,072.50 : x
2. Step 2: Convert to fraction form
   437,691/661,072.50 = 661,072.50/x
3. Step 3: Cross multiply
   437,691x = 661,072.50 × 661,072.50
4. Step 4: Simplify right side
   437,691x = 437,016,850,256.25
5. Step 5: Solve for x
   x = 437,016,850,256.25/437,691
6. Step 6: Final answer
   x = 998,459.76