Finding the Third Proportional to 88,665.89 and 136,287.56

Step by Step Solution

1. Step 1: Write the proportion equation
   88,665.89 : 136,287.56 = 136,287.56 : x
2. Step 2: Convert to fraction form
   88,665.89/136,287.56 = 136,287.56/x
3. Step 3: Cross multiply
   88,665.89x = 136,287.56 × 136,287.56
4. Step 4: Simplify right side
   88,665.89x = 18,574,299,692.19
5. Step 5: Solve for x
   x = 18,574,299,692.19/88,665.89
6. Step 6: Final answer
   x = 209,486.42