Finding the Third Proportional to 209,580 and 455,626.50

Step by Step Solution

1. Step 1: Write the proportion equation
   209,580 : 455,626.50 = 455,626.50 : x
2. Step 2: Convert to fraction form
   209,580/455,626.50 = 455,626.50/x
3. Step 3: Cross multiply
   209,580x = 455,626.50 × 455,626.50
4. Step 4: Simplify right side
   209,580x = 207,595,507,502.25
5. Step 5: Solve for x
   x = 207,595,507,502.25/209,580
6. Step 6: Final answer
   x = 990,531.10