Finding the Fourth Proportional to 9,100.05, 12,558.26 and 5,121.15

Step by Step Solution

1. Step 1: Write the proportion equation
   9,100.05 : 12,558.26 = 5,121.15 : x
2. Step 2: Convert to fraction form
   9,100.05/12,558.26 = 5,121.15/x
3. Step 3: Cross multiply
   9,100.05x = 12,558.26 × 5,121.15
4. Step 4: Simplify right side
   9,100.05x = 64,312,707.59
5. Step 5: Solve for x
   x = 64,312,707.59/9,100.05
6. Step 6: Final answer
   x = 7,067.29