Finding the Fourth Proportional to 15,443.73, 21,312.37 and 8,370.15

Step by Step Solution

1. Step 1: Write the proportion equation
   15,443.73 : 21,312.37 = 8,370.15 : x
2. Step 2: Convert to fraction form
   15,443.73/21,312.37 = 8,370.15/x
3. Step 3: Cross multiply
   15,443.73x = 21,312.37 × 8,370.15
4. Step 4: Simplify right side
   15,443.73x = 178,387,737.10
5. Step 5: Solve for x
   x = 178,387,737.10/15,443.73
6. Step 6: Final answer
   x = 11,550.82