Finding the Third Proportional to 166,428 and 248,278.50

Step by Step Solution

1. Step 1: Write the proportion equation
   166,428 : 248,278.50 = 248,278.50 : x
2. Step 2: Convert to fraction form
   166,428/248,278.50 = 248,278.50/x
3. Step 3: Cross multiply
   166,428x = 248,278.50 × 248,278.50
4. Step 4: Simplify right side
   166,428x = 61,642,213,562.25
5. Step 5: Solve for x
   x = 61,642,213,562.25/166,428
6. Step 6: Final answer
   x = 370,383.67