Finding the Fourth Proportional to 5,111.48, 7,051.38 and 4,447.28

Step by Step Solution

1. Step 1: Write the proportion equation
   5,111.48 : 7,051.38 = 4,447.28 : x
2. Step 2: Convert to fraction form
   5,111.48/7,051.38 = 4,447.28/x
3. Step 3: Cross multiply
   5,111.48x = 7,051.38 × 4,447.28
4. Step 4: Simplify right side
   5,111.48x = 31,359,461.25
5. Step 5: Solve for x
   x = 31,359,461.25/5,111.48
6. Step 6: Final answer
   x = 6,135.10