Finding the Third Proportional to 117,621 and 254,680.50

Step by Step Solution

1. Step 1: Write the proportion equation
   117,621 : 254,680.50 = 254,680.50 : x
2. Step 2: Convert to fraction form
   117,621/254,680.50 = 254,680.50/x
3. Step 3: Cross multiply
   117,621x = 254,680.50 × 254,680.50
4. Step 4: Simplify right side
   117,621x = 64,862,157,080.25
5. Step 5: Solve for x
   x = 64,862,157,080.25/117,621
6. Step 6: Final answer
   x = 551,450.48