Finding the Fourth Proportional to 28,595.61, 42,898.81 and 10,831.59

Step by Step Solution

1. Step 1: Write the proportion equation
   28,595.61 : 42,898.81 = 10,831.59 : x
2. Step 2: Convert to fraction form
   28,595.61/42,898.81 = 10,831.59/x
3. Step 3: Cross multiply
   28,595.61x = 42,898.81 × 10,831.59
4. Step 4: Simplify right side
   28,595.61x = 464,662,294.33
5. Step 5: Solve for x
   x = 464,662,294.33/28,595.61
6. Step 6: Final answer
   x = 16,249.43