Finding the Fourth Proportional to 5,336.64, 7,364.78 and 2,978.72

Step by Step Solution

1. Step 1: Write the proportion equation
   5,336.64 : 7,364.78 = 2,978.72 : x
2. Step 2: Convert to fraction form
   5,336.64/7,364.78 = 2,978.72/x
3. Step 3: Cross multiply
   5,336.64x = 7,364.78 × 2,978.72
4. Step 4: Simplify right side
   5,336.64x = 21,937,617.48
5. Step 5: Solve for x
   x = 21,937,617.48/5,336.64
6. Step 6: Final answer
   x = 4,110.75