Finding the Third Proportional to 72,181.50 and 111,090

Step by Step Solution

1. Step 1: Write the proportion equation
   72,181.50 : 111,090 = 111,090 : x
2. Step 2: Convert to fraction form
   72,181.50/111,090 = 111,090/x
3. Step 3: Cross multiply
   72,181.50x = 111,090 × 111,090
4. Step 4: Simplify right side
   72,181.50x = 12,340,988,100
5. Step 5: Solve for x
   x = 12,340,988,100/72,181.50
6. Step 6: Final answer
   x = 170,971.62