Finding the Fourth Proportional to 9,104.78, 12,564.52 and 5,125.79

Step by Step Solution

1. Step 1: Write the proportion equation
   9,104.78 : 12,564.52 = 5,125.79 : x
2. Step 2: Convert to fraction form
   9,104.78/12,564.52 = 5,125.79/x
3. Step 3: Cross multiply
   9,104.78x = 12,564.52 × 5,125.79
4. Step 4: Simplify right side
   9,104.78x = 64,403,109.57
5. Step 5: Solve for x
   x = 64,403,109.57/9,104.78
6. Step 6: Final answer
   x = 7,073.55