Finding the Third Proportional to 111,300 and 262,468.50

Step by Step Solution

1. Step 1: Write the proportion equation
   111,300 : 262,468.50 = 262,468.50 : x
2. Step 2: Convert to fraction form
   111,300/262,468.50 = 262,468.50/x
3. Step 3: Cross multiply
   111,300x = 262,468.50 × 262,468.50
4. Step 4: Simplify right side
   111,300x = 68,889,713,492.25
5. Step 5: Solve for x
   x = 68,889,713,492.25/111,300
6. Step 6: Final answer
   x = 618,955.20