Finding the Third Proportional to 58,139 and 128,063

Step by Step Solution

1. Step 1: Write the proportion equation
   58,139 : 128,063 = 128,063 : x
2. Step 2: Convert to fraction form
   58,139/128,063 = 128,063/x
3. Step 3: Cross multiply
   58,139x = 128,063 × 128,063
4. Step 4: Simplify right side
   58,139x = 16,400,131,969
5. Step 5: Solve for x
   x = 16,400,131,969/58,139
6. Step 6: Final answer
   x = 282,084.87