Finding the Fourth Proportional to 9,326.47, 12,870.54 and 5,134.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,326.47 : 12,870.54 = 5,134.72 : x
2. Step 2: Convert to fraction form
   9,326.47/12,870.54 = 5,134.72/x
3. Step 3: Cross multiply
   9,326.47x = 12,870.54 × 5,134.72
4. Step 4: Simplify right side
   9,326.47x = 66,086,619.15
5. Step 5: Solve for x
   x = 66,086,619.15/9,326.47
6. Step 6: Final answer
   x = 7,085.92