Finding the Third Proportional to 261,510.19 and 404,100.56

Step by Step Solution

1. Step 1: Write the proportion equation
   261,510.19 : 404,100.56 = 404,100.56 : x
2. Step 2: Convert to fraction form
   261,510.19/404,100.56 = 404,100.56/x
3. Step 3: Cross multiply
   261,510.19x = 404,100.56 × 404,100.56
4. Step 4: Simplify right side
   261,510.19x = 163,297,264,612.82
5. Step 5: Solve for x
   x = 163,297,264,612.82/261,510.19
6. Step 6: Final answer
   x = 624,439.40