Finding the Fourth Proportional to 5,131.05, 7,080.90 and 2,892.74

Step by Step Solution

1. Step 1: Write the proportion equation
   5,131.05 : 7,080.90 = 2,892.74 : x
2. Step 2: Convert to fraction form
   5,131.05/7,080.90 = 2,892.74/x
3. Step 3: Cross multiply
   5,131.05x = 7,080.90 × 2,892.74
4. Step 4: Simplify right side
   5,131.05x = 20,483,167.26
5. Step 5: Solve for x
   x = 20,483,167.26/5,131.05
6. Step 6: Final answer
   x = 3,992.00