Finding the Third Proportional to 113,570 and 238,910

Step by Step Solution

1. Step 1: Write the proportion equation
   113,570 : 238,910 = 238,910 : x
2. Step 2: Convert to fraction form
   113,570/238,910 = 238,910/x
3. Step 3: Cross multiply
   113,570x = 238,910 × 238,910
4. Step 4: Simplify right side
   113,570x = 57,077,988,100
5. Step 5: Solve for x
   x = 57,077,988,100/113,570
6. Step 6: Final answer
   x = 502,579.80