Finding the Third Proportional to 111,087 and 238,590

Step by Step Solution

1. Step 1: Write the proportion equation
   111,087 : 238,590 = 238,590 : x
2. Step 2: Convert to fraction form
   111,087/238,590 = 238,590/x
3. Step 3: Cross multiply
   111,087x = 238,590 × 238,590
4. Step 4: Simplify right side
   111,087x = 56,925,188,100
5. Step 5: Solve for x
   x = 56,925,188,100/111,087
6. Step 6: Final answer
   x = 512,437.89