Finding the Third Proportional to 291,213.50 and 622,908

Step by Step Solution

1. Step 1: Write the proportion equation
   291,213.50 : 622,908 = 622,908 : x
2. Step 2: Convert to fraction form
   291,213.50/622,908 = 622,908/x
3. Step 3: Cross multiply
   291,213.50x = 622,908 × 622,908
4. Step 4: Simplify right side
   291,213.50x = 388,014,376,464
5. Step 5: Solve for x
   x = 388,014,376,464/291,213.50
6. Step 6: Final answer
   x = 1,332,405.18