Finding the Third Proportional to 91,388 and 190,090

Step by Step Solution

1. Step 1: Write the proportion equation
   91,388 : 190,090 = 190,090 : x
2. Step 2: Convert to fraction form
   91,388/190,090 = 190,090/x
3. Step 3: Cross multiply
   91,388x = 190,090 × 190,090
4. Step 4: Simplify right side
   91,388x = 36,134,208,100
5. Step 5: Solve for x
   x = 36,134,208,100/91,388
6. Step 6: Final answer
   x = 395,393.36