Finding the Third Proportional to 90,060 and 208,490

Step by Step Solution

1. Step 1: Write the proportion equation
   90,060 : 208,490 = 208,490 : x
2. Step 2: Convert to fraction form
   90,060/208,490 = 208,490/x
3. Step 3: Cross multiply
   90,060x = 208,490 × 208,490
4. Step 4: Simplify right side
   90,060x = 43,468,080,100
5. Step 5: Solve for x
   x = 43,468,080,100/90,060
6. Step 6: Final answer
   x = 482,656.90