Finding the Third Proportional to 440,931 and 661,990.50

Step by Step Solution

1. Step 1: Write the proportion equation
   440,931 : 661,990.50 = 661,990.50 : x
2. Step 2: Convert to fraction form
   440,931/661,990.50 = 661,990.50/x
3. Step 3: Cross multiply
   440,931x = 661,990.50 × 661,990.50
4. Step 4: Simplify right side
   440,931x = 438,231,422,090.25
5. Step 5: Solve for x
   x = 438,231,422,090.25/440,931
6. Step 6: Final answer
   x = 993,877.55