Finding the Third Proportional to 228,818 and 354,300

Step by Step Solution

1. Step 1: Write the proportion equation
   228,818 : 354,300 = 354,300 : x
2. Step 2: Convert to fraction form
   228,818/354,300 = 354,300/x
3. Step 3: Cross multiply
   228,818x = 354,300 × 354,300
4. Step 4: Simplify right side
   228,818x = 125,528,490,000
5. Step 5: Solve for x
   x = 125,528,490,000/228,818
6. Step 6: Final answer
   x = 548,595.35