Finding the Third Proportional to 89,781.75 and 136,620

Step by Step Solution

1. Step 1: Write the proportion equation
   89,781.75 : 136,620 = 136,620 : x
2. Step 2: Convert to fraction form
   89,781.75/136,620 = 136,620/x
3. Step 3: Cross multiply
   89,781.75x = 136,620 × 136,620
4. Step 4: Simplify right side
   89,781.75x = 18,665,024,400
5. Step 5: Solve for x
   x = 18,665,024,400/89,781.75
6. Step 6: Final answer
   x = 207,893.30