Finding the Fourth Proportional to 13,020.57, 19,504.74 and 5,990.79

Step by Step Solution

1. Step 1: Write the proportion equation
   13,020.57 : 19,504.74 = 5,990.79 : x
2. Step 2: Convert to fraction form
   13,020.57/19,504.74 = 5,990.79/x
3. Step 3: Cross multiply
   13,020.57x = 19,504.74 × 5,990.79
4. Step 4: Simplify right side
   13,020.57x = 116,848,820.15
5. Step 5: Solve for x
   x = 116,848,820.15/13,020.57
6. Step 6: Final answer
   x = 8,974.17