Finding the Fourth Proportional to 20,953.58, 31,393.59 and 17,465.91

Step by Step Solution

1. Step 1: Write the proportion equation
   20,953.58 : 31,393.59 = 17,465.91 : x
2. Step 2: Convert to fraction form
   20,953.58/31,393.59 = 17,465.91/x
3. Step 3: Cross multiply
   20,953.58x = 31,393.59 × 17,465.91
4. Step 4: Simplify right side
   20,953.58x = 548,317,617.52
5. Step 5: Solve for x
   x = 548,317,617.52/20,953.58
6. Step 6: Final answer
   x = 26,168.21