Finding the Fourth Proportional to 21,969.81, 32,959.91 and 7,178.69

Step by Step Solution

1. Step 1: Write the proportion equation
   21,969.81 : 32,959.91 = 7,178.69 : x
2. Step 2: Convert to fraction form
   21,969.81/32,959.91 = 7,178.69/x
3. Step 3: Cross multiply
   21,969.81x = 32,959.91 × 7,178.69
4. Step 4: Simplify right side
   21,969.81x = 236,609,076.66
5. Step 5: Solve for x
   x = 236,609,076.66/21,969.81
6. Step 6: Final answer
   x = 10,769.74