Finding the Fourth Proportional to 22,219.59, 30,663.06 and 12,788.16

Step by Step Solution

1. Step 1: Write the proportion equation
   22,219.59 : 30,663.06 = 12,788.16 : x
2. Step 2: Convert to fraction form
   22,219.59/30,663.06 = 12,788.16/x
3. Step 3: Cross multiply
   22,219.59x = 30,663.06 × 12,788.16
4. Step 4: Simplify right side
   22,219.59x = 392,124,117.37
5. Step 5: Solve for x
   x = 392,124,117.37/22,219.59
6. Step 6: Final answer
   x = 17,647.68