Finding the Fourth Proportional to 4,071.60, 5,715.60 and 4,071.60

Step by Step Solution

1. Step 1: Write the proportion equation
   4,071.60 : 5,715.60 = 4,071.60 : x
2. Step 2: Convert to fraction form
   4,071.60/5,715.60 = 4,071.60/x
3. Step 3: Cross multiply
   4,071.60x = 5,715.60 × 4,071.60
4. Step 4: Simplify right side
   4,071.60x = 23,271,636.96
5. Step 5: Solve for x
   x = 23,271,636.96/4,071.60
6. Step 6: Final answer
   x = 5,715.60