Finding the Fourth Proportional to 13,300.81, 19,954.15 and 3,941.57

Step by Step Solution

1. Step 1: Write the proportion equation
   13,300.81 : 19,954.15 = 3,941.57 : x
2. Step 2: Convert to fraction form
   13,300.81/19,954.15 = 3,941.57/x
3. Step 3: Cross multiply
   13,300.81x = 19,954.15 × 3,941.57
4. Step 4: Simplify right side
   13,300.81x = 78,650,719.05
5. Step 5: Solve for x
   x = 78,650,719.05/13,300.81
6. Step 6: Final answer
   x = 5,913.23