Finding the Third Proportional to 65,389.78 and 133,543.69

Step by Step Solution

1. Step 1: Write the proportion equation
   65,389.78 : 133,543.69 = 133,543.69 : x
2. Step 2: Convert to fraction form
   65,389.78/133,543.69 = 133,543.69/x
3. Step 3: Cross multiply
   65,389.78x = 133,543.69 × 133,543.69
4. Step 4: Simplify right side
   65,389.78x = 17,833,916,471.10
5. Step 5: Solve for x
   x = 17,833,916,471.10/65,389.78
6. Step 6: Final answer
   x = 272,732.47