Finding the Third Proportional to 81,189.50 and 121,454

Step by Step Solution

1. Step 1: Write the proportion equation
   81,189.50 : 121,454 = 121,454 : x
2. Step 2: Convert to fraction form
   81,189.50/121,454 = 121,454/x
3. Step 3: Cross multiply
   81,189.50x = 121,454 × 121,454
4. Step 4: Simplify right side
   81,189.50x = 14,751,074,116
5. Step 5: Solve for x
   x = 14,751,074,116/81,189.50
6. Step 6: Final answer
   x = 181,686.97