Finding the Fourth Proportional to 9,157.73, 12,637.59 and 5,178.83

Step by Step Solution

1. Step 1: Write the proportion equation
   9,157.73 : 12,637.59 = 5,178.83 : x
2. Step 2: Convert to fraction form
   9,157.73/12,637.59 = 5,178.83/x
3. Step 3: Cross multiply
   9,157.73x = 12,637.59 × 5,178.83
4. Step 4: Simplify right side
   9,157.73x = 65,447,930.22
5. Step 5: Solve for x
   x = 65,447,930.22/9,157.73
6. Step 6: Final answer
   x = 7,146.74