Finding the Fourth Proportional to 10,303.47, 15,456.42 and 7,722.81

Step by Step Solution

1. Step 1: Write the proportion equation
   10,303.47 : 15,456.42 = 7,722.81 : x
2. Step 2: Convert to fraction form
   10,303.47/15,456.42 = 7,722.81/x
3. Step 3: Cross multiply
   10,303.47x = 15,456.42 × 7,722.81
4. Step 4: Simplify right side
   10,303.47x = 119,366,994.94
5. Step 5: Solve for x
   x = 119,366,994.94/10,303.47
6. Step 6: Final answer
   x = 11,585.13