Finding the Third Proportional to 72,189 and 112,210.50

Step by Step Solution

1. Step 1: Write the proportion equation
   72,189 : 112,210.50 = 112,210.50 : x
2. Step 2: Convert to fraction form
   72,189/112,210.50 = 112,210.50/x
3. Step 3: Cross multiply
   72,189x = 112,210.50 × 112,210.50
4. Step 4: Simplify right side
   72,189x = 12,591,196,310.25
5. Step 5: Solve for x
   x = 12,591,196,310.25/72,189
6. Step 6: Final answer
   x = 174,419.87