Finding the Fourth Proportional to 22,581, 31,162.86 and 13,628.34

Step by Step Solution

1. Step 1: Write the proportion equation
   22,581 : 31,162.86 = 13,628.34 : x
2. Step 2: Convert to fraction form
   22,581/31,162.86 = 13,628.34/x
3. Step 3: Cross multiply
   22,581x = 31,162.86 × 13,628.34
4. Step 4: Simplify right side
   22,581x = 424,698,051.45
5. Step 5: Solve for x
   x = 424,698,051.45/22,581
6. Step 6: Final answer
   x = 18,807.76