Finding the Fourth Proportional to 5,111.37, 7,053.60 and 3,121.93

Step by Step Solution

1. Step 1: Write the proportion equation
   5,111.37 : 7,053.60 = 3,121.93 : x
2. Step 2: Convert to fraction form
   5,111.37/7,053.60 = 3,121.93/x
3. Step 3: Cross multiply
   5,111.37x = 7,053.60 × 3,121.93
4. Step 4: Simplify right side
   5,111.37x = 22,020,838.86
5. Step 5: Solve for x
   x = 22,020,838.86/5,111.37
6. Step 6: Final answer
   x = 4,308.20