Finding the Third Proportional to 163,623.38 and 342,144

Step by Step Solution

1. Step 1: Write the proportion equation
   163,623.38 : 342,144 = 342,144 : x
2. Step 2: Convert to fraction form
   163,623.38/342,144 = 342,144/x
3. Step 3: Cross multiply
   163,623.38x = 342,144 × 342,144
4. Step 4: Simplify right side
   163,623.38x = 117,062,516,736
5. Step 5: Solve for x
   x = 117,062,516,736/163,623.38
6. Step 6: Final answer
   x = 715,438.83