Finding the Fourth Proportional to 13,124.05, 18,111.44 and 7,821.94

Step by Step Solution

1. Step 1: Write the proportion equation
   13,124.05 : 18,111.44 = 7,821.94 : x
2. Step 2: Convert to fraction form
   13,124.05/18,111.44 = 7,821.94/x
3. Step 3: Cross multiply
   13,124.05x = 18,111.44 × 7,821.94
4. Step 4: Simplify right side
   13,124.05x = 141,666,601.17
5. Step 5: Solve for x
   x = 141,666,601.17/13,124.05
6. Step 6: Final answer
   x = 10,794.43