Finding the Third Proportional to 180,298.50 and 280,290

Step by Step Solution

1. Step 1: Write the proportion equation
   180,298.50 : 280,290 = 280,290 : x
2. Step 2: Convert to fraction form
   180,298.50/280,290 = 280,290/x
3. Step 3: Cross multiply
   180,298.50x = 280,290 × 280,290
4. Step 4: Simplify right side
   180,298.50x = 78,562,484,100
5. Step 5: Solve for x
   x = 78,562,484,100/180,298.50
6. Step 6: Final answer
   x = 435,735.65