Finding the Fourth Proportional to 3,875.16, 5,347.61 and 2,106.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,875.16 : 5,347.61 = 2,106.72 : x
2. Step 2: Convert to fraction form
   3,875.16/5,347.61 = 2,106.72/x
3. Step 3: Cross multiply
   3,875.16x = 5,347.61 × 2,106.72
4. Step 4: Simplify right side
   3,875.16x = 11,265,906.41
5. Step 5: Solve for x
   x = 11,265,906.41/3,875.16
6. Step 6: Final answer
   x = 2,907.21