Finding the Third Proportional to 90,430 and 189,122

Step by Step Solution

1. Step 1: Write the proportion equation
   90,430 : 189,122 = 189,122 : x
2. Step 2: Convert to fraction form
   90,430/189,122 = 189,122/x
3. Step 3: Cross multiply
   90,430x = 189,122 × 189,122
4. Step 4: Simplify right side
   90,430x = 35,767,130,884
5. Step 5: Solve for x
   x = 35,767,130,884/90,430
6. Step 6: Final answer
   x = 395,522.85