Finding the Third Proportional to 85,230 and 189,090

Step by Step Solution

1. Step 1: Write the proportion equation
   85,230 : 189,090 = 189,090 : x
2. Step 2: Convert to fraction form
   85,230/189,090 = 189,090/x
3. Step 3: Cross multiply
   85,230x = 189,090 × 189,090
4. Step 4: Simplify right side
   85,230x = 35,755,028,100
5. Step 5: Solve for x
   x = 35,755,028,100/85,230
6. Step 6: Final answer
   x = 419,512.24