Finding the Fourth Proportional to 28,111.86, 38,826.27 and 19,143.81

Step by Step Solution

1. Step 1: Write the proportion equation
   28,111.86 : 38,826.27 = 19,143.81 : x
2. Step 2: Convert to fraction form
   28,111.86/38,826.27 = 19,143.81/x
3. Step 3: Cross multiply
   28,111.86x = 38,826.27 × 19,143.81
4. Step 4: Simplify right side
   28,111.86x = 743,282,735.89
5. Step 5: Solve for x
   x = 743,282,735.89/28,111.86
6. Step 6: Final answer
   x = 26,440.18