Finding the Third Proportional to 122,391 and 172,357.88

Step by Step Solution

1. Step 1: Write the proportion equation
   122,391 : 172,357.88 = 172,357.88 : x
2. Step 2: Convert to fraction form
   122,391/172,357.88 = 172,357.88/x
3. Step 3: Cross multiply
   122,391x = 172,357.88 × 172,357.88
4. Step 4: Simplify right side
   122,391x = 29,707,237,074.52
5. Step 5: Solve for x
   x = 29,707,237,074.52/122,391
6. Step 6: Final answer
   x = 242,724.03