Finding the Third Proportional to 189,488 and 407,650

Step by Step Solution

1. Step 1: Write the proportion equation
   189,488 : 407,650 = 407,650 : x
2. Step 2: Convert to fraction form
   189,488/407,650 = 407,650/x
3. Step 3: Cross multiply
   189,488x = 407,650 × 407,650
4. Step 4: Simplify right side
   189,488x = 166,178,522,500
5. Step 5: Solve for x
   x = 166,178,522,500/189,488
6. Step 6: Final answer
   x = 876,987.05