Finding the Fourth Proportional to 4,997.88, 7,499.57 and 2,806.79

Step by Step Solution

1. Step 1: Write the proportion equation
   4,997.88 : 7,499.57 = 2,806.79 : x
2. Step 2: Convert to fraction form
   4,997.88/7,499.57 = 2,806.79/x
3. Step 3: Cross multiply
   4,997.88x = 7,499.57 × 2,806.79
4. Step 4: Simplify right side
   4,997.88x = 21,049,666.55
5. Step 5: Solve for x
   x = 21,049,666.55/4,997.88
6. Step 6: Final answer
   x = 4,211.72