Finding the Third Proportional to 40,790 and 90,316

Step by Step Solution

1. Step 1: Write the proportion equation
   40,790 : 90,316 = 90,316 : x
2. Step 2: Convert to fraction form
   40,790/90,316 = 90,316/x
3. Step 3: Cross multiply
   40,790x = 90,316 × 90,316
4. Step 4: Simplify right side
   40,790x = 8,156,979,856
5. Step 5: Solve for x
   x = 8,156,979,856/40,790
6. Step 6: Final answer
   x = 199,974.99