Finding the Third Proportional to 228,480 and 357,300

Step by Step Solution

1. Step 1: Write the proportion equation
   228,480 : 357,300 = 357,300 : x
2. Step 2: Convert to fraction form
   228,480/357,300 = 357,300/x
3. Step 3: Cross multiply
   228,480x = 357,300 × 357,300
4. Step 4: Simplify right side
   228,480x = 127,663,290,000
5. Step 5: Solve for x
   x = 127,663,290,000/228,480
6. Step 6: Final answer
   x = 558,750.39