Finding the Third Proportional to 184,560 and 390,990

Step by Step Solution

1. Step 1: Write the proportion equation
   184,560 : 390,990 = 390,990 : x
2. Step 2: Convert to fraction form
   184,560/390,990 = 390,990/x
3. Step 3: Cross multiply
   184,560x = 390,990 × 390,990
4. Step 4: Simplify right side
   184,560x = 152,873,180,100
5. Step 5: Solve for x
   x = 152,873,180,100/184,560
6. Step 6: Final answer
   x = 828,311.55