Finding the Third Proportional to 116,956 and 257,240

Step by Step Solution

1. Step 1: Write the proportion equation
   116,956 : 257,240 = 257,240 : x
2. Step 2: Convert to fraction form
   116,956/257,240 = 257,240/x
3. Step 3: Cross multiply
   116,956x = 257,240 × 257,240
4. Step 4: Simplify right side
   116,956x = 66,172,417,600
5. Step 5: Solve for x
   x = 66,172,417,600/116,956
6. Step 6: Final answer
   x = 565,788.99