Finding the Third Proportional to 221,688 and 476,635.50

Step by Step Solution

1. Step 1: Write the proportion equation
   221,688 : 476,635.50 = 476,635.50 : x
2. Step 2: Convert to fraction form
   221,688/476,635.50 = 476,635.50/x
3. Step 3: Cross multiply
   221,688x = 476,635.50 × 476,635.50
4. Step 4: Simplify right side
   221,688x = 227,181,399,860.25
5. Step 5: Solve for x
   x = 227,181,399,860.25/221,688
6. Step 6: Final answer
   x = 1,024,779.87