Finding the Fourth Proportional to 28,527.75, 42,806.34 and 12,737.61

Step by Step Solution

1. Step 1: Write the proportion equation
   28,527.75 : 42,806.34 = 12,737.61 : x
2. Step 2: Convert to fraction form
   28,527.75/42,806.34 = 12,737.61/x
3. Step 3: Cross multiply
   28,527.75x = 42,806.34 × 12,737.61
4. Step 4: Simplify right side
   28,527.75x = 545,250,464.45
5. Step 5: Solve for x
   x = 545,250,464.45/28,527.75
6. Step 6: Final answer
   x = 19,112.99