Finding the Fourth Proportional to 13,313.89, 19,967.10 and 3,953.53

Step by Step Solution

1. Step 1: Write the proportion equation
   13,313.89 : 19,967.10 = 3,953.53 : x
2. Step 2: Convert to fraction form
   13,313.89/19,967.10 = 3,953.53/x
3. Step 3: Cross multiply
   13,313.89x = 19,967.10 × 3,953.53
4. Step 4: Simplify right side
   13,313.89x = 78,940,528.86
5. Step 5: Solve for x
   x = 78,940,528.86/13,313.89
6. Step 6: Final answer
   x = 5,929.19