Finding the Third Proportional to 445,081.50 and 510,691.50

Step by Step Solution

1. Step 1: Write the proportion equation
   445,081.50 : 510,691.50 = 510,691.50 : x
2. Step 2: Convert to fraction form
   445,081.50/510,691.50 = 510,691.50/x
3. Step 3: Cross multiply
   445,081.50x = 510,691.50 × 510,691.50
4. Step 4: Simplify right side
   445,081.50x = 260,805,808,172.25
5. Step 5: Solve for x
   x = 260,805,808,172.25/445,081.50
6. Step 6: Final answer
   x = 585,973.15