Finding the Fourth Proportional to 7,978.56, 11,969.28 and 2,713.02

Step by Step Solution

1. Step 1: Write the proportion equation
   7,978.56 : 11,969.28 = 2,713.02 : x
2. Step 2: Convert to fraction form
   7,978.56/11,969.28 = 2,713.02/x
3. Step 3: Cross multiply
   7,978.56x = 11,969.28 × 2,713.02
4. Step 4: Simplify right side
   7,978.56x = 32,472,896.03
5. Step 5: Solve for x
   x = 32,472,896.03/7,978.56
6. Step 6: Final answer
   x = 4,070.02