Finding the Third Proportional to 90,086.50 and 208,526.50

Step by Step Solution

1. Step 1: Write the proportion equation
   90,086.50 : 208,526.50 = 208,526.50 : x
2. Step 2: Convert to fraction form
   90,086.50/208,526.50 = 208,526.50/x
3. Step 3: Cross multiply
   90,086.50x = 208,526.50 × 208,526.50
4. Step 4: Simplify right side
   90,086.50x = 43,483,301,202.25
5. Step 5: Solve for x
   x = 43,483,301,202.25/90,086.50
6. Step 6: Final answer
   x = 482,683.88