Finding the Third Proportional to 90,081.75 and 208,515

Step by Step Solution

1. Step 1: Write the proportion equation
   90,081.75 : 208,515 = 208,515 : x
2. Step 2: Convert to fraction form
   90,081.75/208,515 = 208,515/x
3. Step 3: Cross multiply
   90,081.75x = 208,515 × 208,515
4. Step 4: Simplify right side
   90,081.75x = 43,478,505,225
5. Step 5: Solve for x
   x = 43,478,505,225/90,081.75
6. Step 6: Final answer
   x = 482,656.09