Finding the Fourth Proportional to 5,185.91, 7,156.74 and 2,947.88

Step by Step Solution

1. Step 1: Write the proportion equation
   5,185.91 : 7,156.74 = 2,947.88 : x
2. Step 2: Convert to fraction form
   5,185.91/7,156.74 = 2,947.88/x
3. Step 3: Cross multiply
   5,185.91x = 7,156.74 × 2,947.88
4. Step 4: Simplify right side
   5,185.91x = 21,097,174.93
5. Step 5: Solve for x
   x = 21,097,174.93/5,185.91
6. Step 6: Final answer
   x = 4,068.18