Finding the Fourth Proportional to 9,403.20, 12,976.59 and 5,153.98

Step by Step Solution

1. Step 1: Write the proportion equation
   9,403.20 : 12,976.59 = 5,153.98 : x
2. Step 2: Convert to fraction form
   9,403.20/12,976.59 = 5,153.98/x
3. Step 3: Cross multiply
   9,403.20x = 12,976.59 × 5,153.98
4. Step 4: Simplify right side
   9,403.20x = 66,881,085.33
5. Step 5: Solve for x
   x = 66,881,085.33/9,403.20
6. Step 6: Final answer
   x = 7,112.59