Finding the Fourth Proportional to 9,304.78, 12,840.72 and 5,113

Step by Step Solution

1. Step 1: Write the proportion equation
   9,304.78 : 12,840.72 = 5,113 : x
2. Step 2: Convert to fraction form
   9,304.78/12,840.72 = 5,113/x
3. Step 3: Cross multiply
   9,304.78x = 12,840.72 × 5,113
4. Step 4: Simplify right side
   9,304.78x = 65,654,601.36
5. Step 5: Solve for x
   x = 65,654,601.36/9,304.78
6. Step 6: Final answer
   x = 7,056.01