Finding the Third Proportional to 257,167.50 and 556,617

Step by Step Solution

1. Step 1: Write the proportion equation
   257,167.50 : 556,617 = 556,617 : x
2. Step 2: Convert to fraction form
   257,167.50/556,617 = 556,617/x
3. Step 3: Cross multiply
   257,167.50x = 556,617 × 556,617
4. Step 4: Simplify right side
   257,167.50x = 309,822,484,689
5. Step 5: Solve for x
   x = 309,822,484,689/257,167.50
6. Step 6: Final answer
   x = 1,204,749.76