Finding the Fourth Proportional to 15.83, 21.83 and 10.00

Step by Step Solution

1. Step 1: Write the proportion equation
   15.83 : 21.83 = 10.00 : x
2. Step 2: Convert to fraction form
   15.83/21.83 = 10.00/x
3. Step 3: Cross multiply
   15.83x = 21.83 × 10.00
4. Step 4: Simplify right side
   15.83x = 218.27
5. Step 5: Solve for x
   x = 218.27/15.83
6. Step 6: Final answer
   x = 13.79