Finding the Third Proportional to 58,956 and 128,172

Step by Step Solution

1. Step 1: Write the proportion equation
   58,956 : 128,172 = 128,172 : x
2. Step 2: Convert to fraction form
   58,956/128,172 = 128,172/x
3. Step 3: Cross multiply
   58,956x = 128,172 × 128,172
4. Step 4: Simplify right side
   58,956x = 16,428,061,584
5. Step 5: Solve for x
   x = 16,428,061,584/58,956
6. Step 6: Final answer
   x = 278,649.53