Finding the Fourth Proportional to 2,178.37, 2,999.59 and 1,969.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,178.37 : 2,999.59 = 1,969.98 : x
2. Step 2: Convert to fraction form
   2,178.37/2,999.59 = 1,969.98/x
3. Step 3: Cross multiply
   2,178.37x = 2,999.59 × 1,969.98
4. Step 4: Simplify right side
   2,178.37x = 5,909,132.31
5. Step 5: Solve for x
   x = 5,909,132.31/2,178.37
6. Step 6: Final answer
   x = 2,712.64