Finding the Third Proportional to 155,990 and 223,073.50

Step by Step Solution

1. Step 1: Write the proportion equation
   155,990 : 223,073.50 = 223,073.50 : x
2. Step 2: Convert to fraction form
   155,990/223,073.50 = 223,073.50/x
3. Step 3: Cross multiply
   155,990x = 223,073.50 × 223,073.50
4. Step 4: Simplify right side
   155,990x = 49,761,786,402.25
5. Step 5: Solve for x
   x = 49,761,786,402.25/155,990
6. Step 6: Final answer
   x = 319,006.26