Finding the Fourth Proportional to 20,779.84, 31,173.83 and 7,632.31

Step by Step Solution

1. Step 1: Write the proportion equation
   20,779.84 : 31,173.83 = 7,632.31 : x
2. Step 2: Convert to fraction form
   20,779.84/31,173.83 = 7,632.31/x
3. Step 3: Cross multiply
   20,779.84x = 31,173.83 × 7,632.31
4. Step 4: Simplify right side
   20,779.84x = 237,928,296.29
5. Step 5: Solve for x
   x = 237,928,296.29/20,779.84
6. Step 6: Final answer
   x = 11,449.96