Finding the Fourth Proportional to 7,179.69, 10,770.15 and 1,985.55

Step by Step Solution

1. Step 1: Write the proportion equation
   7,179.69 : 10,770.15 = 1,985.55 : x
2. Step 2: Convert to fraction form
   7,179.69/10,770.15 = 1,985.55/x
3. Step 3: Cross multiply
   7,179.69x = 10,770.15 × 1,985.55
4. Step 4: Simplify right side
   7,179.69x = 21,384,671.33
5. Step 5: Solve for x
   x = 21,384,671.33/7,179.69
6. Step 6: Final answer
   x = 2,978.50