Finding the Third Proportional to 225,145.50 and 342,360

Step by Step Solution

1. Step 1: Write the proportion equation
   225,145.50 : 342,360 = 342,360 : x
2. Step 2: Convert to fraction form
   225,145.50/342,360 = 342,360/x
3. Step 3: Cross multiply
   225,145.50x = 342,360 × 342,360
4. Step 4: Simplify right side
   225,145.50x = 117,210,369,600
5. Step 5: Solve for x
   x = 117,210,369,600/225,145.50
6. Step 6: Final answer
   x = 520,598.32