Finding the Third Proportional to 90,440 and 189,136

Step by Step Solution

1. Step 1: Write the proportion equation
   90,440 : 189,136 = 189,136 : x
2. Step 2: Convert to fraction form
   90,440/189,136 = 189,136/x
3. Step 3: Cross multiply
   90,440x = 189,136 × 189,136
4. Step 4: Simplify right side
   90,440x = 35,772,426,496
5. Step 5: Solve for x
   x = 35,772,426,496/90,440
6. Step 6: Final answer
   x = 395,537.67