Finding the Fourth Proportional to 4,783.77, 7,171.72 and 2,113.47

Step by Step Solution

1. Step 1: Write the proportion equation
   4,783.77 : 7,171.72 = 2,113.47 : x
2. Step 2: Convert to fraction form
   4,783.77/7,171.72 = 2,113.47/x
3. Step 3: Cross multiply
   4,783.77x = 7,171.72 × 2,113.47
4. Step 4: Simplify right side
   4,783.77x = 15,157,209.78
5. Step 5: Solve for x
   x = 15,157,209.78/4,783.77
6. Step 6: Final answer
   x = 3,168.47