Finding the Fourth Proportional to 7,128.18, 10,695.51 and 3,667.86

Step by Step Solution

1. Step 1: Write the proportion equation
   7,128.18 : 10,695.51 = 3,667.86 : x
2. Step 2: Convert to fraction form
   7,128.18/10,695.51 = 3,667.86/x
3. Step 3: Cross multiply
   7,128.18x = 10,695.51 × 3,667.86
4. Step 4: Simplify right side
   7,128.18x = 39,229,633.31
5. Step 5: Solve for x
   x = 39,229,633.31/7,128.18
6. Step 6: Final answer
   x = 5,503.46