Finding the Third Proportional to 117,405 and 251,410.50

Step by Step Solution

1. Step 1: Write the proportion equation
   117,405 : 251,410.50 = 251,410.50 : x
2. Step 2: Convert to fraction form
   117,405/251,410.50 = 251,410.50/x
3. Step 3: Cross multiply
   117,405x = 251,410.50 × 251,410.50
4. Step 4: Simplify right side
   117,405x = 63,207,239,510.25
5. Step 5: Solve for x
   x = 63,207,239,510.25/117,405
6. Step 6: Final answer
   x = 538,369.23