Finding the Fourth Proportional to 22,928, 34,401.72 and 12,385.58

Step by Step Solution

1. Step 1: Write the proportion equation
   22,928 : 34,401.72 = 12,385.58 : x
2. Step 2: Convert to fraction form
   22,928/34,401.72 = 12,385.58/x
3. Step 3: Cross multiply
   22,928x = 34,401.72 × 12,385.58
4. Step 4: Simplify right side
   22,928x = 426,085,255.20
5. Step 5: Solve for x
   x = 426,085,255.20/22,928
6. Step 6: Final answer
   x = 18,583.62