Finding the Fourth Proportional to 22,817, 31,501.91 and 15,658.90

Step by Step Solution

1. Step 1: Write the proportion equation
   22,817 : 31,501.91 = 15,658.90 : x
2. Step 2: Convert to fraction form
   22,817/31,501.91 = 15,658.90/x
3. Step 3: Cross multiply
   22,817x = 31,501.91 × 15,658.90
4. Step 4: Simplify right side
   22,817x = 493,285,022.69
5. Step 5: Solve for x
   x = 493,285,022.69/22,817
6. Step 6: Final answer
   x = 21,619.19