Finding the Fourth Proportional to 5,728.79, 7,904.01 and 3,709.01

Step by Step Solution

1. Step 1: Write the proportion equation
   5,728.79 : 7,904.01 = 3,709.01 : x
2. Step 2: Convert to fraction form
   5,728.79/7,904.01 = 3,709.01/x
3. Step 3: Cross multiply
   5,728.79x = 7,904.01 × 3,709.01
4. Step 4: Simplify right side
   5,728.79x = 29,316,071.89
5. Step 5: Solve for x
   x = 29,316,071.89/5,728.79
6. Step 6: Final answer
   x = 5,117.32