Finding the Fourth Proportional to 5,131.30, 7,081.25 and 2,892.98

Step by Step Solution

1. Step 1: Write the proportion equation
   5,131.30 : 7,081.25 = 2,892.98 : x
2. Step 2: Convert to fraction form
   5,131.30/7,081.25 = 2,892.98/x
3. Step 3: Cross multiply
   5,131.30x = 7,081.25 × 2,892.98
4. Step 4: Simplify right side
   5,131.30x = 20,485,914.63
5. Step 5: Solve for x
   x = 20,485,914.63/5,131.30
6. Step 6: Final answer
   x = 3,992.34