Finding the Fourth Proportional to 22,005.12, 30,365.16 and 12,929.52

Step by Step Solution

1. Step 1: Write the proportion equation
   22,005.12 : 30,365.16 = 12,929.52 : x
2. Step 2: Convert to fraction form
   22,005.12/30,365.16 = 12,929.52/x
3. Step 3: Cross multiply
   22,005.12x = 30,365.16 × 12,929.52
4. Step 4: Simplify right side
   22,005.12x = 392,606,943.52
5. Step 5: Solve for x
   x = 392,606,943.52/22,005.12
6. Step 6: Final answer
   x = 17,841.62