Finding the Fourth Proportional to 9,091.68, 12,546.39 and 5,112.79

Step by Step Solution

1. Step 1: Write the proportion equation
   9,091.68 : 12,546.39 = 5,112.79 : x
2. Step 2: Convert to fraction form
   9,091.68/12,546.39 = 5,112.79/x
3. Step 3: Cross multiply
   9,091.68x = 12,546.39 × 5,112.79
4. Step 4: Simplify right side
   9,091.68x = 64,147,045.14
5. Step 5: Solve for x
   x = 64,147,045.14/9,091.68
6. Step 6: Final answer
   x = 7,055.58