Finding the Third Proportional to 111,291.39 and 172,434.84

Step by Step Solution

1. Step 1: Write the proportion equation
   111,291.39 : 172,434.84 = 172,434.84 : x
2. Step 2: Convert to fraction form
   111,291.39/172,434.84 = 172,434.84/x
3. Step 3: Cross multiply
   111,291.39x = 172,434.84 × 172,434.84
4. Step 4: Simplify right side
   111,291.39x = 29,733,774,328.73
5. Step 5: Solve for x
   x = 29,733,774,328.73/111,291.39
6. Step 6: Final answer
   x = 267,170.48