Finding the Third Proportional to 72,578 and 155,140

Step by Step Solution

1. Step 1: Write the proportion equation
   72,578 : 155,140 = 155,140 : x
2. Step 2: Convert to fraction form
   72,578/155,140 = 155,140/x
3. Step 3: Cross multiply
   72,578x = 155,140 × 155,140
4. Step 4: Simplify right side
   72,578x = 24,068,419,600
5. Step 5: Solve for x
   x = 24,068,419,600/72,578
6. Step 6: Final answer
   x = 331,621.42