Finding the Third Proportional to 116,422 and 251,390

Step by Step Solution

1. Step 1: Write the proportion equation
   116,422 : 251,390 = 251,390 : x
2. Step 2: Convert to fraction form
   116,422/251,390 = 251,390/x
3. Step 3: Cross multiply
   116,422x = 251,390 × 251,390
4. Step 4: Simplify right side
   116,422x = 63,196,932,100
5. Step 5: Solve for x
   x = 63,196,932,100/116,422
6. Step 6: Final answer
   x = 542,826.37