Finding the Fourth Proportional to 4,870.13, 6,715.50 and 3,099.47

Step by Step Solution

1. Step 1: Write the proportion equation
   4,870.13 : 6,715.50 = 3,099.47 : x
2. Step 2: Convert to fraction form
   4,870.13/6,715.50 = 3,099.47/x
3. Step 3: Cross multiply
   4,870.13x = 6,715.50 × 3,099.47
4. Step 4: Simplify right side
   4,870.13x = 20,814,499.83
5. Step 5: Solve for x
   x = 20,814,499.83/4,870.13
6. Step 6: Final answer
   x = 4,273.91