Finding the Third Proportional to 291,164.50 and 617,321

Step by Step Solution

1. Step 1: Write the proportion equation
   291,164.50 : 617,321 = 617,321 : x
2. Step 2: Convert to fraction form
   291,164.50/617,321 = 617,321/x
3. Step 3: Cross multiply
   291,164.50x = 617,321 × 617,321
4. Step 4: Simplify right side
   291,164.50x = 381,085,217,041
5. Step 5: Solve for x
   x = 381,085,217,041/291,164.50
6. Step 6: Final answer
   x = 1,308,831.32