Finding the Third Proportional to 172,910 and 253,131

Step by Step Solution

1. Step 1: Write the proportion equation
   172,910 : 253,131 = 253,131 : x
2. Step 2: Convert to fraction form
   172,910/253,131 = 253,131/x
3. Step 3: Cross multiply
   172,910x = 253,131 × 253,131
4. Step 4: Simplify right side
   172,910x = 64,075,303,161
5. Step 5: Solve for x
   x = 64,075,303,161/172,910
6. Step 6: Final answer
   x = 370,570.26