Finding the Third Proportional to 243,345 and 325,507.50

Step by Step Solution

1. Step 1: Write the proportion equation
   243,345 : 325,507.50 = 325,507.50 : x
2. Step 2: Convert to fraction form
   243,345/325,507.50 = 325,507.50/x
3. Step 3: Cross multiply
   243,345x = 325,507.50 × 325,507.50
4. Step 4: Simplify right side
   243,345x = 105,955,132,556.25
5. Step 5: Solve for x
   x = 105,955,132,556.25/243,345
6. Step 6: Final answer
   x = 435,411.18