Finding the Fourth Proportional to 20,697.69, 31,047.69 and 5,905.42

Step by Step Solution

1. Step 1: Write the proportion equation
   20,697.69 : 31,047.69 = 5,905.42 : x
2. Step 2: Convert to fraction form
   20,697.69/31,047.69 = 5,905.42/x
3. Step 3: Cross multiply
   20,697.69x = 31,047.69 × 5,905.42
4. Step 4: Simplify right side
   20,697.69x = 183,349,619.95
5. Step 5: Solve for x
   x = 183,349,619.95/20,697.69
6. Step 6: Final answer
   x = 8,858.46