Finding the Fourth Proportional to 8,931.81, 13,393.89 and 3,663.16

Step by Step Solution

1. Step 1: Write the proportion equation
   8,931.81 : 13,393.89 = 3,663.16 : x
2. Step 2: Convert to fraction form
   8,931.81/13,393.89 = 3,663.16/x
3. Step 3: Cross multiply
   8,931.81x = 13,393.89 × 3,663.16
4. Step 4: Simplify right side
   8,931.81x = 49,063,962.09
5. Step 5: Solve for x
   x = 49,063,962.09/8,931.81
6. Step 6: Final answer
   x = 5,493.17