Finding the Fourth Proportional to 21,969.42, 32,959.35 and 7,178.31

Step by Step Solution

1. Step 1: Write the proportion equation
   21,969.42 : 32,959.35 = 7,178.31 : x
2. Step 2: Convert to fraction form
   21,969.42/32,959.35 = 7,178.31/x
3. Step 3: Cross multiply
   21,969.42x = 32,959.35 × 7,178.31
4. Step 4: Simplify right side
   21,969.42x = 236,592,431.70
5. Step 5: Solve for x
   x = 236,592,431.70/21,969.42
6. Step 6: Final answer
   x = 10,769.17