Finding the Fourth Proportional to 5,381.57, 8,072.83 and 1,485.98

Step by Step Solution

1. Step 1: Write the proportion equation
   5,381.57 : 8,072.83 = 1,485.98 : x
2. Step 2: Convert to fraction form
   5,381.57/8,072.83 = 1,485.98/x
3. Step 3: Cross multiply
   5,381.57x = 8,072.83 × 1,485.98
4. Step 4: Simplify right side
   5,381.57x = 11,996,080.39
5. Step 5: Solve for x
   x = 11,996,080.39/5,381.57
6. Step 6: Final answer
   x = 2,229.10