Finding the Third Proportional to 285,184.50 and 398,730

Step by Step Solution

1. Step 1: Write the proportion equation
   285,184.50 : 398,730 = 398,730 : x
2. Step 2: Convert to fraction form
   285,184.50/398,730 = 398,730/x
3. Step 3: Cross multiply
   285,184.50x = 398,730 × 398,730
4. Step 4: Simplify right side
   285,184.50x = 158,985,612,900
5. Step 5: Solve for x
   x = 158,985,612,900/285,184.50
6. Step 6: Final answer
   x = 557,483.36