Finding the Third Proportional to 90,538.50 and 140,985

Step by Step Solution

1. Step 1: Write the proportion equation
   90,538.50 : 140,985 = 140,985 : x
2. Step 2: Convert to fraction form
   90,538.50/140,985 = 140,985/x
3. Step 3: Cross multiply
   90,538.50x = 140,985 × 140,985
4. Step 4: Simplify right side
   90,538.50x = 19,876,770,225
5. Step 5: Solve for x
   x = 19,876,770,225/90,538.50
6. Step 6: Final answer
   x = 219,539.42