Finding the Third Proportional to 87,090 and 188,672.25

Step by Step Solution

1. Step 1: Write the proportion equation
   87,090 : 188,672.25 = 188,672.25 : x
2. Step 2: Convert to fraction form
   87,090/188,672.25 = 188,672.25/x
3. Step 3: Cross multiply
   87,090x = 188,672.25 × 188,672.25
4. Step 4: Simplify right side
   87,090x = 35,597,217,920.06
5. Step 5: Solve for x
   x = 35,597,217,920.06/87,090
6. Step 6: Final answer
   x = 408,740.59