Finding the Third Proportional to 172,357.50 and 372,390

Step by Step Solution

1. Step 1: Write the proportion equation
   172,357.50 : 372,390 = 372,390 : x
2. Step 2: Convert to fraction form
   172,357.50/372,390 = 372,390/x
3. Step 3: Cross multiply
   172,357.50x = 372,390 × 372,390
4. Step 4: Simplify right side
   172,357.50x = 138,674,312,100
5. Step 5: Solve for x
   x = 138,674,312,100/172,357.50
6. Step 6: Final answer
   x = 804,573.70