Finding the Third Proportional to 90,699.75 and 143,491.50

Step by Step Solution

1. Step 1: Write the proportion equation
   90,699.75 : 143,491.50 = 143,491.50 : x
2. Step 2: Convert to fraction form
   90,699.75/143,491.50 = 143,491.50/x
3. Step 3: Cross multiply
   90,699.75x = 143,491.50 × 143,491.50
4. Step 4: Simplify right side
   90,699.75x = 20,589,810,572.25
5. Step 5: Solve for x
   x = 20,589,810,572.25/90,699.75
6. Step 6: Final answer
   x = 227,010.67