Finding the Third Proportional to 117,404 and 251,428

Step by Step Solution

1. Step 1: Write the proportion equation
   117,404 : 251,428 = 251,428 : x
2. Step 2: Convert to fraction form
   117,404/251,428 = 251,428/x
3. Step 3: Cross multiply
   117,404x = 251,428 × 251,428
4. Step 4: Simplify right side
   117,404x = 63,216,039,184
5. Step 5: Solve for x
   x = 63,216,039,184/117,404
6. Step 6: Final answer
   x = 538,448.77