Finding the Third Proportional to 90,315.28 and 140,642.16

Step by Step Solution

1. Step 1: Write the proportion equation
   90,315.28 : 140,642.16 = 140,642.16 : x
2. Step 2: Convert to fraction form
   90,315.28/140,642.16 = 140,642.16/x
3. Step 3: Cross multiply
   90,315.28x = 140,642.16 × 140,642.16
4. Step 4: Simplify right side
   90,315.28x = 19,780,216,114.65
5. Step 5: Solve for x
   x = 19,780,216,114.65/90,315.28
6. Step 6: Final answer
   x = 219,012.95