Finding the Third Proportional to 166,153.50 and 390,079.50

Step by Step Solution

1. Step 1: Write the proportion equation
   166,153.50 : 390,079.50 = 390,079.50 : x
2. Step 2: Convert to fraction form
   166,153.50/390,079.50 = 390,079.50/x
3. Step 3: Cross multiply
   166,153.50x = 390,079.50 × 390,079.50
4. Step 4: Simplify right side
   166,153.50x = 152,162,016,320.25
5. Step 5: Solve for x
   x = 152,162,016,320.25/166,153.50
6. Step 6: Final answer
   x = 915,791.82