Finding the Fourth Proportional to 5,336.60, 7,364.28 and 2,978.72

Step by Step Solution

1. Step 1: Write the proportion equation
   5,336.60 : 7,364.28 = 2,978.72 : x
2. Step 2: Convert to fraction form
   5,336.60/7,364.28 = 2,978.72/x
3. Step 3: Cross multiply
   5,336.60x = 7,364.28 × 2,978.72
4. Step 4: Simplify right side
   5,336.60x = 21,936,128.12
5. Step 5: Solve for x
   x = 21,936,128.12/5,336.60
6. Step 6: Final answer
   x = 4,110.51