Finding the Fourth Proportional to 31,696.52, 43,728.72 and 20,364.32

Step by Step Solution

1. Step 1: Write the proportion equation
   31,696.52 : 43,728.72 = 20,364.32 : x
2. Step 2: Convert to fraction form
   31,696.52/43,728.72 = 20,364.32/x
3. Step 3: Cross multiply
   31,696.52x = 43,728.72 × 20,364.32
4. Step 4: Simplify right side
   31,696.52x = 890,505,647.27
5. Step 5: Solve for x
   x = 890,505,647.27/31,696.52
6. Step 6: Final answer
   x = 28,094.75