Finding the Third Proportional to 166,886 and 258,248.50

Step by Step Solution

1. Step 1: Write the proportion equation
   166,886 : 258,248.50 = 258,248.50 : x
2. Step 2: Convert to fraction form
   166,886/258,248.50 = 258,248.50/x
3. Step 3: Cross multiply
   166,886x = 258,248.50 × 258,248.50
4. Step 4: Simplify right side
   166,886x = 66,692,287,752.25
5. Step 5: Solve for x
   x = 66,692,287,752.25/166,886
6. Step 6: Final answer
   x = 399,627.82