Finding the Third Proportional to 87,388 and 191,131

Step by Step Solution

1. Step 1: Write the proportion equation
   87,388 : 191,131 = 191,131 : x
2. Step 2: Convert to fraction form
   87,388/191,131 = 191,131/x
3. Step 3: Cross multiply
   87,388x = 191,131 × 191,131
4. Step 4: Simplify right side
   87,388x = 36,531,059,161
5. Step 5: Solve for x
   x = 36,531,059,161/87,388
6. Step 6: Final answer
   x = 418,032.90