Finding the Third Proportional to 199,617 and 408,547.50

Step by Step Solution

1. Step 1: Write the proportion equation
   199,617 : 408,547.50 = 408,547.50 : x
2. Step 2: Convert to fraction form
   199,617/408,547.50 = 408,547.50/x
3. Step 3: Cross multiply
   199,617x = 408,547.50 × 408,547.50
4. Step 4: Simplify right side
   199,617x = 166,911,059,756.25
5. Step 5: Solve for x
   x = 166,911,059,756.25/199,617
6. Step 6: Final answer
   x = 836,156.54