Finding the Third Proportional to 166,091 and 389,925

Step by Step Solution

1. Step 1: Write the proportion equation
   166,091 : 389,925 = 389,925 : x
2. Step 2: Convert to fraction form
   166,091/389,925 = 389,925/x
3. Step 3: Cross multiply
   166,091x = 389,925 × 389,925
4. Step 4: Simplify right side
   166,091x = 152,041,505,625
5. Step 5: Solve for x
   x = 152,041,505,625/166,091
6. Step 6: Final answer
   x = 915,410.86