Finding the Fourth Proportional to 19,321.16, 28,970.63 and 10,304.15

Step by Step Solution

1. Step 1: Write the proportion equation
   19,321.16 : 28,970.63 = 10,304.15 : x
2. Step 2: Convert to fraction form
   19,321.16/28,970.63 = 10,304.15/x
3. Step 3: Cross multiply
   19,321.16x = 28,970.63 × 10,304.15
4. Step 4: Simplify right side
   19,321.16x = 298,517,665.59
5. Step 5: Solve for x
   x = 298,517,665.59/19,321.16
6. Step 6: Final answer
   x = 15,450.30