Finding the Third Proportional to 432,173 and 654,221.50

Step by Step Solution

1. Step 1: Write the proportion equation
   432,173 : 654,221.50 = 654,221.50 : x
2. Step 2: Convert to fraction form
   432,173/654,221.50 = 654,221.50/x
3. Step 3: Cross multiply
   432,173x = 654,221.50 × 654,221.50
4. Step 4: Simplify right side
   432,173x = 428,005,771,062.25
5. Step 5: Solve for x
   x = 428,005,771,062.25/432,173
6. Step 6: Final answer
   x = 990,357.50