Finding the Third Proportional to 90,057 and 208,483.50

Step by Step Solution

1. Step 1: Write the proportion equation
   90,057 : 208,483.50 = 208,483.50 : x
2. Step 2: Convert to fraction form
   90,057/208,483.50 = 208,483.50/x
3. Step 3: Cross multiply
   90,057x = 208,483.50 × 208,483.50
4. Step 4: Simplify right side
   90,057x = 43,465,369,772.25
5. Step 5: Solve for x
   x = 43,465,369,772.25/90,057
6. Step 6: Final answer
   x = 482,642.88