Finding the Fourth Proportional to 5,109.95, 7,051.61 and 2,871.79

Step by Step Solution

1. Step 1: Write the proportion equation
   5,109.95 : 7,051.61 = 2,871.79 : x
2. Step 2: Convert to fraction form
   5,109.95/7,051.61 = 2,871.79/x
3. Step 3: Cross multiply
   5,109.95x = 7,051.61 × 2,871.79
4. Step 4: Simplify right side
   5,109.95x = 20,250,732.63
5. Step 5: Solve for x
   x = 20,250,732.63/5,109.95
6. Step 6: Final answer
   x = 3,963.00