Finding the Third Proportional to 258,726.50 and 556,798

Step by Step Solution

1. Step 1: Write the proportion equation
   258,726.50 : 556,798 = 556,798 : x
2. Step 2: Convert to fraction form
   258,726.50/556,798 = 556,798/x
3. Step 3: Cross multiply
   258,726.50x = 556,798 × 556,798
4. Step 4: Simplify right side
   258,726.50x = 310,024,012,804
5. Step 5: Solve for x
   x = 310,024,012,804/258,726.50
6. Step 6: Final answer
   x = 1,198,269.26