Finding the Fourth Proportional to 5,368.31, 7,407.56 and 2,978.25

Step by Step Solution

1. Step 1: Write the proportion equation
   5,368.31 : 7,407.56 = 2,978.25 : x
2. Step 2: Convert to fraction form
   5,368.31/7,407.56 = 2,978.25/x
3. Step 3: Cross multiply
   5,368.31x = 7,407.56 × 2,978.25
4. Step 4: Simplify right side
   5,368.31x = 22,061,550.68
5. Step 5: Solve for x
   x = 22,061,550.68/5,368.31
6. Step 6: Final answer
   x = 4,109.59