Finding the Third Proportional to 72,639 and 111,070.50

Step by Step Solution

1. Step 1: Write the proportion equation
   72,639 : 111,070.50 = 111,070.50 : x
2. Step 2: Convert to fraction form
   72,639/111,070.50 = 111,070.50/x
3. Step 3: Cross multiply
   72,639x = 111,070.50 × 111,070.50
4. Step 4: Simplify right side
   72,639x = 12,336,655,970.25
5. Step 5: Solve for x
   x = 12,336,655,970.25/72,639
6. Step 6: Final answer
   x = 169,835.16