Finding the Fourth Proportional to 5,199.10, 7,784.34 and 3,945.94

Step by Step Solution

1. Step 1: Write the proportion equation
   5,199.10 : 7,784.34 = 3,945.94 : x
2. Step 2: Convert to fraction form
   5,199.10/7,784.34 = 3,945.94/x
3. Step 3: Cross multiply
   5,199.10x = 7,784.34 × 3,945.94
4. Step 4: Simplify right side
   5,199.10x = 30,716,538.58
5. Step 5: Solve for x
   x = 30,716,538.58/5,199.10
6. Step 6: Final answer
   x = 5,908.05