Finding the Fourth Proportional to 22,355.91, 30,881 and 15,663.69

Step by Step Solution

1. Step 1: Write the proportion equation
   22,355.91 : 30,881 = 15,663.69 : x
2. Step 2: Convert to fraction form
   22,355.91/30,881 = 15,663.69/x
3. Step 3: Cross multiply
   22,355.91x = 30,881 × 15,663.69
4. Step 4: Simplify right side
   22,355.91x = 483,710,410.89
5. Step 5: Solve for x
   x = 483,710,410.89/22,355.91
6. Step 6: Final answer
   x = 21,636.80