Finding the Third Proportional to 61,399.13 and 91,719.56

Step by Step Solution

1. Step 1: Write the proportion equation
   61,399.13 : 91,719.56 = 91,719.56 : x
2. Step 2: Convert to fraction form
   61,399.13/91,719.56 = 91,719.56/x
3. Step 3: Cross multiply
   61,399.13x = 91,719.56 × 91,719.56
4. Step 4: Simplify right side
   61,399.13x = 8,412,478,145.19
5. Step 5: Solve for x
   x = 8,412,478,145.19/61,399.13
6. Step 6: Final answer
   x = 137,013.00