Finding the Third Proportional to 90,407 and 189,076

Step by Step Solution

1. Step 1: Write the proportion equation
   90,407 : 189,076 = 189,076 : x
2. Step 2: Convert to fraction form
   90,407/189,076 = 189,076/x
3. Step 3: Cross multiply
   90,407x = 189,076 × 189,076
4. Step 4: Simplify right side
   90,407x = 35,749,733,776
5. Step 5: Solve for x
   x = 35,749,733,776/90,407
6. Step 6: Final answer
   x = 395,431.04