Finding the Third Proportional to 72,570 and 109,278

Step by Step Solution

1. Step 1: Write the proportion equation
   72,570 : 109,278 = 109,278 : x
2. Step 2: Convert to fraction form
   72,570/109,278 = 109,278/x
3. Step 3: Cross multiply
   72,570x = 109,278 × 109,278
4. Step 4: Simplify right side
   72,570x = 11,941,681,284
5. Step 5: Solve for x
   x = 11,941,681,284/72,570
6. Step 6: Final answer
   x = 164,553.97