Finding the Fourth Proportional to 5,185, 7,155.72 and 2,947.60

Step by Step Solution

1. Step 1: Write the proportion equation
   5,185 : 7,155.72 = 2,947.60 : x
2. Step 2: Convert to fraction form
   5,185/7,155.72 = 2,947.60/x
3. Step 3: Cross multiply
   5,185x = 7,155.72 × 2,947.60
4. Step 4: Simplify right side
   5,185x = 21,092,200.27
5. Step 5: Solve for x
   x = 21,092,200.27/5,185
6. Step 6: Final answer
   x = 4,067.93