Finding the Third Proportional to 99,913.25 and 209,063.50

Step by Step Solution

1. Step 1: Write the proportion equation
   99,913.25 : 209,063.50 = 209,063.50 : x
2. Step 2: Convert to fraction form
   99,913.25/209,063.50 = 209,063.50/x
3. Step 3: Cross multiply
   99,913.25x = 209,063.50 × 209,063.50
4. Step 4: Simplify right side
   99,913.25x = 43,707,547,032.25
5. Step 5: Solve for x
   x = 43,707,547,032.25/99,913.25
6. Step 6: Final answer
   x = 437,454.96