Finding the Third Proportional to 293,790 and 642,934.50

Step by Step Solution

1. Step 1: Write the proportion equation
   293,790 : 642,934.50 = 642,934.50 : x
2. Step 2: Convert to fraction form
   293,790/642,934.50 = 642,934.50/x
3. Step 3: Cross multiply
   293,790x = 642,934.50 × 642,934.50
4. Step 4: Simplify right side
   293,790x = 413,364,771,290.25
5. Step 5: Solve for x
   x = 413,364,771,290.25/293,790
6. Step 6: Final answer
   x = 1,407,007.63