Finding the Third Proportional to 121,291.50 and 173,680

Step by Step Solution

1. Step 1: Write the proportion equation
   121,291.50 : 173,680 = 173,680 : x
2. Step 2: Convert to fraction form
   121,291.50/173,680 = 173,680/x
3. Step 3: Cross multiply
   121,291.50x = 173,680 × 173,680
4. Step 4: Simplify right side
   121,291.50x = 30,164,742,400
5. Step 5: Solve for x
   x = 30,164,742,400/121,291.50
6. Step 6: Final answer
   x = 248,696.26