Finding the Third Proportional to 293,453 and 643,160.50

Step by Step Solution

1. Step 1: Write the proportion equation
   293,453 : 643,160.50 = 643,160.50 : x
2. Step 2: Convert to fraction form
   293,453/643,160.50 = 643,160.50/x
3. Step 3: Cross multiply
   293,453x = 643,160.50 × 643,160.50
4. Step 4: Simplify right side
   293,453x = 413,655,428,760.25
5. Step 5: Solve for x
   x = 413,655,428,760.25/293,453
6. Step 6: Final answer
   x = 1,409,613.90