Finding the Third Proportional to 156,639 and 238,636.50

Step by Step Solution

1. Step 1: Write the proportion equation
   156,639 : 238,636.50 = 238,636.50 : x
2. Step 2: Convert to fraction form
   156,639/238,636.50 = 238,636.50/x
3. Step 3: Cross multiply
   156,639x = 238,636.50 × 238,636.50
4. Step 4: Simplify right side
   156,639x = 56,947,379,132.25
5. Step 5: Solve for x
   x = 56,947,379,132.25/156,639
6. Step 6: Final answer
   x = 363,558.11