Finding the Fourth Proportional to 20,736.61, 31,104.89 and 5,154.23

Step by Step Solution

1. Step 1: Write the proportion equation
   20,736.61 : 31,104.89 = 5,154.23 : x
2. Step 2: Convert to fraction form
   20,736.61/31,104.89 = 5,154.23/x
3. Step 3: Cross multiply
   20,736.61x = 31,104.89 × 5,154.23
4. Step 4: Simplify right side
   20,736.61x = 160,321,828.50
5. Step 5: Solve for x
   x = 160,321,828.50/20,736.61
6. Step 6: Final answer
   x = 7,731.34