Finding the Third Proportional to 189,385.25 and 405,037

Step by Step Solution

1. Step 1: Write the proportion equation
   189,385.25 : 405,037 = 405,037 : x
2. Step 2: Convert to fraction form
   189,385.25/405,037 = 405,037/x
3. Step 3: Cross multiply
   189,385.25x = 405,037 × 405,037
4. Step 4: Simplify right side
   189,385.25x = 164,054,971,369
5. Step 5: Solve for x
   x = 164,054,971,369/189,385.25
6. Step 6: Final answer
   x = 866,249.99