Finding the Third Proportional to 78,912 and 115,434

Step by Step Solution

1. Step 1: Write the proportion equation
   78,912 : 115,434 = 115,434 : x
2. Step 2: Convert to fraction form
   78,912/115,434 = 115,434/x
3. Step 3: Cross multiply
   78,912x = 115,434 × 115,434
4. Step 4: Simplify right side
   78,912x = 13,325,008,356
5. Step 5: Solve for x
   x = 13,325,008,356/78,912
6. Step 6: Final answer
   x = 168,859.09