Finding the Third Proportional to 221,800.50 and 347,490

Step by Step Solution

1. Step 1: Write the proportion equation
   221,800.50 : 347,490 = 347,490 : x
2. Step 2: Convert to fraction form
   221,800.50/347,490 = 347,490/x
3. Step 3: Cross multiply
   221,800.50x = 347,490 × 347,490
4. Step 4: Simplify right side
   221,800.50x = 120,749,300,100
5. Step 5: Solve for x
   x = 120,749,300,100/221,800.50
6. Step 6: Final answer
   x = 544,405.00