Finding the Third Proportional to 138,390 and 225,975.75

Step by Step Solution

1. Step 1: Write the proportion equation
   138,390 : 225,975.75 = 225,975.75 : x
2. Step 2: Convert to fraction form
   138,390/225,975.75 = 225,975.75/x
3. Step 3: Cross multiply
   138,390x = 225,975.75 × 225,975.75
4. Step 4: Simplify right side
   138,390x = 51,065,039,588.06
5. Step 5: Solve for x
   x = 51,065,039,588.06/138,390
6. Step 6: Final answer
   x = 368,993.71