Finding the Third Proportional to 448,588.50 and 666,402

Step by Step Solution

1. Step 1: Write the proportion equation
   448,588.50 : 666,402 = 666,402 : x
2. Step 2: Convert to fraction form
   448,588.50/666,402 = 666,402/x
3. Step 3: Cross multiply
   448,588.50x = 666,402 × 666,402
4. Step 4: Simplify right side
   448,588.50x = 444,091,625,604
5. Step 5: Solve for x
   x = 444,091,625,604/448,588.50
6. Step 6: Final answer
   x = 989,975.50