Finding the Fourth Proportional to 7,123.02, 9,828.24 and 4,137.31

Step by Step Solution

1. Step 1: Write the proportion equation
   7,123.02 : 9,828.24 = 4,137.31 : x
2. Step 2: Convert to fraction form
   7,123.02/9,828.24 = 4,137.31/x
3. Step 3: Cross multiply
   7,123.02x = 9,828.24 × 4,137.31
4. Step 4: Simplify right side
   7,123.02x = 40,662,461.41
5. Step 5: Solve for x
   x = 40,662,461.41/7,123.02
6. Step 6: Final answer
   x = 5,708.60