Finding the Third Proportional to 90,684 and 140,889

Step by Step Solution

1. Step 1: Write the proportion equation
   90,684 : 140,889 = 140,889 : x
2. Step 2: Convert to fraction form
   90,684/140,889 = 140,889/x
3. Step 3: Cross multiply
   90,684x = 140,889 × 140,889
4. Step 4: Simplify right side
   90,684x = 19,849,710,321
5. Step 5: Solve for x
   x = 19,849,710,321/90,684
6. Step 6: Final answer
   x = 218,888.78