Finding the Third Proportional to 156,555 and 209,731.50

Step by Step Solution

1. Step 1: Write the proportion equation
   156,555 : 209,731.50 = 209,731.50 : x
2. Step 2: Convert to fraction form
   156,555/209,731.50 = 209,731.50/x
3. Step 3: Cross multiply
   156,555x = 209,731.50 × 209,731.50
4. Step 4: Simplify right side
   156,555x = 43,987,302,092.25
5. Step 5: Solve for x
   x = 43,987,302,092.25/156,555
6. Step 6: Final answer
   x = 280,970.28