Finding the Fourth Proportional to 5,185.71, 7,156.29 and 2,947.60

Step by Step Solution

1. Step 1: Write the proportion equation
   5,185.71 : 7,156.29 = 2,947.60 : x
2. Step 2: Convert to fraction form
   5,185.71/7,156.29 = 2,947.60/x
3. Step 3: Cross multiply
   5,185.71x = 7,156.29 × 2,947.60
4. Step 4: Simplify right side
   5,185.71x = 21,093,880.40
5. Step 5: Solve for x
   x = 21,093,880.40/5,185.71
6. Step 6: Final answer
   x = 4,067.69