Finding the Third Proportional to 292,176 and 390,150

Step by Step Solution

1. Step 1: Write the proportion equation
   292,176 : 390,150 = 390,150 : x
2. Step 2: Convert to fraction form
   292,176/390,150 = 390,150/x
3. Step 3: Cross multiply
   292,176x = 390,150 × 390,150
4. Step 4: Simplify right side
   292,176x = 152,217,022,500
5. Step 5: Solve for x
   x = 152,217,022,500/292,176
6. Step 6: Final answer
   x = 520,977.16