Finding the Fourth Proportional to 9,100.48, 12,559.20 and 5,121.76

Step by Step Solution

1. Step 1: Write the proportion equation
   9,100.48 : 12,559.20 = 5,121.76 : x
2. Step 2: Convert to fraction form
   9,100.48/12,559.20 = 5,121.76/x
3. Step 3: Cross multiply
   9,100.48x = 12,559.20 × 5,121.76
4. Step 4: Simplify right side
   9,100.48x = 64,325,208.19
5. Step 5: Solve for x
   x = 64,325,208.19/9,100.48
6. Step 6: Final answer
   x = 7,068.33