Finding the Third Proportional to 61,390 and 91,105

Step by Step Solution

1. Step 1: Write the proportion equation
   61,390 : 91,105 = 91,105 : x
2. Step 2: Convert to fraction form
   61,390/91,105 = 91,105/x
3. Step 3: Cross multiply
   61,390x = 91,105 × 91,105
4. Step 4: Simplify right side
   61,390x = 8,300,121,025
5. Step 5: Solve for x
   x = 8,300,121,025/61,390
6. Step 6: Final answer
   x = 135,203.14