Finding the Third Proportional to 166,131 and 390,028.50

Step by Step Solution

1. Step 1: Write the proportion equation
   166,131 : 390,028.50 = 390,028.50 : x
2. Step 2: Convert to fraction form
   166,131/390,028.50 = 390,028.50/x
3. Step 3: Cross multiply
   166,131x = 390,028.50 × 390,028.50
4. Step 4: Simplify right side
   166,131x = 152,122,230,812.25
5. Step 5: Solve for x
   x = 152,122,230,812.25/166,131
6. Step 6: Final answer
   x = 915,676.37