Finding the Third Proportional to 111,291.25 and 262,453

Step by Step Solution

1. Step 1: Write the proportion equation
   111,291.25 : 262,453 = 262,453 : x
2. Step 2: Convert to fraction form
   111,291.25/262,453 = 262,453/x
3. Step 3: Cross multiply
   111,291.25x = 262,453 × 262,453
4. Step 4: Simplify right side
   111,291.25x = 68,881,577,209
5. Step 5: Solve for x
   x = 68,881,577,209/111,291.25
6. Step 6: Final answer
   x = 618,930.75