Finding the Fourth Proportional to 3,607.84, 4,978.88 and 2,116.83

Step by Step Solution

1. Step 1: Write the proportion equation
   3,607.84 : 4,978.88 = 2,116.83 : x
2. Step 2: Convert to fraction form
   3,607.84/4,978.88 = 2,116.83/x
3. Step 3: Cross multiply
   3,607.84x = 4,978.88 × 2,116.83
4. Step 4: Simplify right side
   3,607.84x = 10,539,442.55
5. Step 5: Solve for x
   x = 10,539,442.55/3,607.84
6. Step 6: Final answer
   x = 2,921.26