Finding the Third Proportional to 123,520 and 266,240

Step by Step Solution

1. Step 1: Write the proportion equation
   123,520 : 266,240 = 266,240 : x
2. Step 2: Convert to fraction form
   123,520/266,240 = 266,240/x
3. Step 3: Cross multiply
   123,520x = 266,240 × 266,240
4. Step 4: Simplify right side
   123,520x = 70,883,737,600
5. Step 5: Solve for x
   x = 70,883,737,600/123,520
6. Step 6: Final answer
   x = 573,864.46