Finding the Fourth Proportional to 9,100.69, 12,558.65 and 5,121.56

Step by Step Solution

1. Step 1: Write the proportion equation
   9,100.69 : 12,558.65 = 5,121.56 : x
2. Step 2: Convert to fraction form
   9,100.69/12,558.65 = 5,121.56/x
3. Step 3: Cross multiply
   9,100.69x = 12,558.65 × 5,121.56
4. Step 4: Simplify right side
   9,100.69x = 64,319,885.28
5. Step 5: Solve for x
   x = 64,319,885.28/9,100.69
6. Step 6: Final answer
   x = 7,067.59