Finding the Third Proportional to 61,145.38 and 91,436.75

Step by Step Solution

1. Step 1: Write the proportion equation
   61,145.38 : 91,436.75 = 91,436.75 : x
2. Step 2: Convert to fraction form
   61,145.38/91,436.75 = 91,436.75/x
3. Step 3: Cross multiply
   61,145.38x = 91,436.75 × 91,436.75
4. Step 4: Simplify right side
   61,145.38x = 8,360,679,250.56
5. Step 5: Solve for x
   x = 8,360,679,250.56/61,145.38
6. Step 6: Final answer
   x = 136,734.45