Finding the Fourth Proportional to 5,871.60, 8,112.06 and 5,405.04

Step by Step Solution

1. Step 1: Write the proportion equation
   5,871.60 : 8,112.06 = 5,405.04 : x
2. Step 2: Convert to fraction form
   5,871.60/8,112.06 = 5,405.04/x
3. Step 3: Cross multiply
   5,871.60x = 8,112.06 × 5,405.04
4. Step 4: Simplify right side
   5,871.60x = 43,846,008.78
5. Step 5: Solve for x
   x = 43,846,008.78/5,871.60
6. Step 6: Final answer
   x = 7,467.47