Finding the Third Proportional to 155,908 and 251,090

Step by Step Solution

1. Step 1: Write the proportion equation
   155,908 : 251,090 = 251,090 : x
2. Step 2: Convert to fraction form
   155,908/251,090 = 251,090/x
3. Step 3: Cross multiply
   155,908x = 251,090 × 251,090
4. Step 4: Simplify right side
   155,908x = 63,046,188,100
5. Step 5: Solve for x
   x = 63,046,188,100/155,908
6. Step 6: Final answer
   x = 404,380.71