Finding the Third Proportional to 291,209 and 622,898.75

Step by Step Solution

1. Step 1: Write the proportion equation
   291,209 : 622,898.75 = 622,898.75 : x
2. Step 2: Convert to fraction form
   291,209/622,898.75 = 622,898.75/x
3. Step 3: Cross multiply
   291,209x = 622,898.75 × 622,898.75
4. Step 4: Simplify right side
   291,209x = 388,002,852,751.56
5. Step 5: Solve for x
   x = 388,002,852,751.56/291,209
6. Step 6: Final answer
   x = 1,332,386.20