Finding the Fourth Proportional to 3,875.17, 5,814.40 and 2,118.12

Step by Step Solution

1. Step 1: Write the proportion equation
   3,875.17 : 5,814.40 = 2,118.12 : x
2. Step 2: Convert to fraction form
   3,875.17/5,814.40 = 2,118.12/x
3. Step 3: Cross multiply
   3,875.17x = 5,814.40 × 2,118.12
4. Step 4: Simplify right side
   3,875.17x = 12,315,591.63
5. Step 5: Solve for x
   x = 12,315,591.63/3,875.17
6. Step 6: Final answer
   x = 3,178.08