Finding the Fourth Proportional to 8,648.52, 12,971.54 and 4,938.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,648.52 : 12,971.54 = 4,938.72 : x
2. Step 2: Convert to fraction form
   8,648.52/12,971.54 = 4,938.72/x
3. Step 3: Cross multiply
   8,648.52x = 12,971.54 × 4,938.72
4. Step 4: Simplify right side
   8,648.52x = 64,062,804.03
5. Step 5: Solve for x
   x = 64,062,804.03/8,648.52
6. Step 6: Final answer
   x = 7,407.37