Finding the Fourth Proportional to 5,388.53, 8,079.89 and 2,100.74

Step by Step Solution

1. Step 1: Write the proportion equation
   5,388.53 : 8,079.89 = 2,100.74 : x
2. Step 2: Convert to fraction form
   5,388.53/8,079.89 = 2,100.74/x
3. Step 3: Cross multiply
   5,388.53x = 8,079.89 × 2,100.74
4. Step 4: Simplify right side
   5,388.53x = 16,973,697.22
5. Step 5: Solve for x
   x = 16,973,697.22/5,388.53
6. Step 6: Final answer
   x = 3,149.97