Finding the Third Proportional to 291,309 and 443,044.50

Step by Step Solution

1. Step 1: Write the proportion equation
   291,309 : 443,044.50 = 443,044.50 : x
2. Step 2: Convert to fraction form
   291,309/443,044.50 = 443,044.50/x
3. Step 3: Cross multiply
   291,309x = 443,044.50 × 443,044.50
4. Step 4: Simplify right side
   291,309x = 196,288,428,980.25
5. Step 5: Solve for x
   x = 196,288,428,980.25/291,309
6. Step 6: Final answer
   x = 673,815.19