Finding the Third Proportional to 90,153 and 140,143

Step by Step Solution

1. Step 1: Write the proportion equation
   90,153 : 140,143 = 140,143 : x
2. Step 2: Convert to fraction form
   90,153/140,143 = 140,143/x
3. Step 3: Cross multiply
   90,153x = 140,143 × 140,143
4. Step 4: Simplify right side
   90,153x = 19,640,060,449
5. Step 5: Solve for x
   x = 19,640,060,449/90,153
6. Step 6: Final answer
   x = 217,852.54