Finding the Third Proportional to 7,422.47 and 10,890.28

Step by Step Solution

1. Step 1: Write the proportion equation
   7,422.47 : 10,890.28 = 10,890.28 : x
2. Step 2: Convert to fraction form
   7,422.47/10,890.28 = 10,890.28/x
3. Step 3: Cross multiply
   7,422.47x = 10,890.28 × 10,890.28
4. Step 4: Simplify right side
   7,422.47x = 118,598,225.70
5. Step 5: Solve for x
   x = 118,598,225.70/7,422.47
6. Step 6: Final answer
   x = 15,978.27