Finding the Fourth Proportional to 3,784.84, 5,661.06 and 3,156.28

Step by Step Solution

1. Step 1: Write the proportion equation
   3,784.84 : 5,661.06 = 3,156.28 : x
2. Step 2: Convert to fraction form
   3,784.84/5,661.06 = 3,156.28/x
3. Step 3: Cross multiply
   3,784.84x = 5,661.06 × 3,156.28
4. Step 4: Simplify right side
   3,784.84x = 17,867,890.46
5. Step 5: Solve for x
   x = 17,867,890.46/3,784.84
6. Step 6: Final answer
   x = 4,720.91