Finding the Third Proportional to 72,700 and 156,890

Step by Step Solution

1. Step 1: Write the proportion equation
   72,700 : 156,890 = 156,890 : x
2. Step 2: Convert to fraction form
   72,700/156,890 = 156,890/x
3. Step 3: Cross multiply
   72,700x = 156,890 × 156,890
4. Step 4: Simplify right side
   72,700x = 24,614,472,100
5. Step 5: Solve for x
   x = 24,614,472,100/72,700
6. Step 6: Final answer
   x = 338,575.96