Finding the Third Proportional to 58,857.89 and 128,719.13

Step by Step Solution

1. Step 1: Write the proportion equation
   58,857.89 : 128,719.13 = 128,719.13 : x
2. Step 2: Convert to fraction form
   58,857.89/128,719.13 = 128,719.13/x
3. Step 3: Cross multiply
   58,857.89x = 128,719.13 × 128,719.13
4. Step 4: Simplify right side
   58,857.89x = 16,568,613,140.77
5. Step 5: Solve for x
   x = 16,568,613,140.77/58,857.89
6. Step 6: Final answer
   x = 281,501.99