Finding the Fourth Proportional to 9,100.39, 12,559.74 and 5,122.28

Step by Step Solution

1. Step 1: Write the proportion equation
   9,100.39 : 12,559.74 = 5,122.28 : x
2. Step 2: Convert to fraction form
   9,100.39/12,559.74 = 5,122.28/x
3. Step 3: Cross multiply
   9,100.39x = 12,559.74 × 5,122.28
4. Step 4: Simplify right side
   9,100.39x = 64,334,416.60
5. Step 5: Solve for x
   x = 64,334,416.60/9,100.39
6. Step 6: Final answer
   x = 7,069.42