Finding the Third Proportional to 253,908.42 and 371,517.89

Step by Step Solution

1. Step 1: Write the proportion equation
   253,908.42 : 371,517.89 = 371,517.89 : x
2. Step 2: Convert to fraction form
   253,908.42/371,517.89 = 371,517.89/x
3. Step 3: Cross multiply
   253,908.42x = 371,517.89 × 371,517.89
4. Step 4: Simplify right side
   253,908.42x = 138,025,543,054.45
5. Step 5: Solve for x
   x = 138,025,543,054.45/253,908.42
6. Step 6: Final answer
   x = 543,603.64