Finding the Third Proportional to 38,172 and 78,942

Step by Step Solution

1. Step 1: Write the proportion equation
   38,172 : 78,942 = 78,942 : x
2. Step 2: Convert to fraction form
   38,172/78,942 = 78,942/x
3. Step 3: Cross multiply
   38,172x = 78,942 × 78,942
4. Step 4: Simplify right side
   38,172x = 6,231,839,364
5. Step 5: Solve for x
   x = 6,231,839,364/38,172
6. Step 6: Final answer
   x = 163,256.82