Finding the Third Proportional to 257,038.50 and 556,980

Step by Step Solution

1. Step 1: Write the proportion equation
   257,038.50 : 556,980 = 556,980 : x
2. Step 2: Convert to fraction form
   257,038.50/556,980 = 556,980/x
3. Step 3: Cross multiply
   257,038.50x = 556,980 × 556,980
4. Step 4: Simplify right side
   257,038.50x = 310,226,720,400
5. Step 5: Solve for x
   x = 310,226,720,400/257,038.50
6. Step 6: Final answer
   x = 1,206,927.06