Finding the Fourth Proportional to 5,965.42, 8,931.49 and 3,880.21

Step by Step Solution

1. Step 1: Write the proportion equation
   5,965.42 : 8,931.49 = 3,880.21 : x
2. Step 2: Convert to fraction form
   5,965.42/8,931.49 = 3,880.21/x
3. Step 3: Cross multiply
   5,965.42x = 8,931.49 × 3,880.21
4. Step 4: Simplify right side
   5,965.42x = 34,656,056.81
5. Step 5: Solve for x
   x = 34,656,056.81/5,965.42
6. Step 6: Final answer
   x = 5,809.49