Finding the Fourth Proportional to 21,054.24, 31,580.58 and 5,259.24

Step by Step Solution

1. Step 1: Write the proportion equation
   21,054.24 : 31,580.58 = 5,259.24 : x
2. Step 2: Convert to fraction form
   21,054.24/31,580.58 = 5,259.24/x
3. Step 3: Cross multiply
   21,054.24x = 31,580.58 × 5,259.24
4. Step 4: Simplify right side
   21,054.24x = 166,089,849.56
5. Step 5: Solve for x
   x = 166,089,849.56/21,054.24
6. Step 6: Final answer
   x = 7,888.67