Finding the Fourth Proportional to 20,659.94, 31,174.56 and 20,659.94

Step by Step Solution

1. Step 1: Write the proportion equation
   20,659.94 : 31,174.56 = 20,659.94 : x
2. Step 2: Convert to fraction form
   20,659.94/31,174.56 = 20,659.94/x
3. Step 3: Cross multiply
   20,659.94x = 31,174.56 × 20,659.94
4. Step 4: Simplify right side
   20,659.94x = 644,064,539.13
5. Step 5: Solve for x
   x = 644,064,539.13/20,659.94
6. Step 6: Final answer
   x = 31,174.56