Finding the Fourth Proportional to 5,131.14, 7,078.98 and 2,892.51

Step by Step Solution

1. Step 1: Write the proportion equation
   5,131.14 : 7,078.98 = 2,892.51 : x
2. Step 2: Convert to fraction form
   5,131.14/7,078.98 = 2,892.51/x
3. Step 3: Cross multiply
   5,131.14x = 7,078.98 × 2,892.51
4. Step 4: Simplify right side
   5,131.14x = 20,475,970.58
5. Step 5: Solve for x
   x = 20,475,970.58/5,131.14
6. Step 6: Final answer
   x = 3,990.53