Finding the Third Proportional to 89.63 and 187.13

Step by Step Solution

1. Step 1: Write the proportion equation
   89.63 : 187.13 = 187.13 : x
2. Step 2: Convert to fraction form
   89.63/187.13 = 187.13/x
3. Step 3: Cross multiply
   89.63x = 187.13 × 187.13
4. Step 4: Simplify right side
   89.63x = 35,015.77
5. Step 5: Solve for x
   x = 35,015.77/89.63
6. Step 6: Final answer
   x = 390.69