Finding the Third Proportional to 156,780 and 238,856

Step by Step Solution

1. Step 1: Write the proportion equation
   156,780 : 238,856 = 238,856 : x
2. Step 2: Convert to fraction form
   156,780/238,856 = 238,856/x
3. Step 3: Cross multiply
   156,780x = 238,856 × 238,856
4. Step 4: Simplify right side
   156,780x = 57,052,188,736
5. Step 5: Solve for x
   x = 57,052,188,736/156,780
6. Step 6: Final answer
   x = 363,899.66