Finding the Fourth Proportional to 5,387.58, 8,081.35 and 2,100.69

Step by Step Solution

1. Step 1: Write the proportion equation
   5,387.58 : 8,081.35 = 2,100.69 : x
2. Step 2: Convert to fraction form
   5,387.58/8,081.35 = 2,100.69/x
3. Step 3: Cross multiply
   5,387.58x = 8,081.35 × 2,100.69
4. Step 4: Simplify right side
   5,387.58x = 16,976,411.13
5. Step 5: Solve for x
   x = 16,976,411.13/5,387.58
6. Step 6: Final answer
   x = 3,151.03