Finding the Third Proportional to 111,280.50 and 240,381

Step by Step Solution

1. Step 1: Write the proportion equation
   111,280.50 : 240,381 = 240,381 : x
2. Step 2: Convert to fraction form
   111,280.50/240,381 = 240,381/x
3. Step 3: Cross multiply
   111,280.50x = 240,381 × 240,381
4. Step 4: Simplify right side
   111,280.50x = 57,783,025,161
5. Step 5: Solve for x
   x = 57,783,025,161/111,280.50
6. Step 6: Final answer
   x = 519,255.62