Finding the Fourth Proportional to 9,393.76, 12,963.53 and 5,144.74

Step by Step Solution

1. Step 1: Write the proportion equation
   9,393.76 : 12,963.53 = 5,144.74 : x
2. Step 2: Convert to fraction form
   9,393.76/12,963.53 = 5,144.74/x
3. Step 3: Cross multiply
   9,393.76x = 12,963.53 × 5,144.74
4. Step 4: Simplify right side
   9,393.76x = 66,693,979.31
5. Step 5: Solve for x
   x = 66,693,979.31/9,393.76
6. Step 6: Final answer
   x = 7,099.82