Finding the Fourth Proportional to 20,784.28, 31,175.48 and 7,635.69

Step by Step Solution

1. Step 1: Write the proportion equation
   20,784.28 : 31,175.48 = 7,635.69 : x
2. Step 2: Convert to fraction form
   20,784.28/31,175.48 = 7,635.69/x
3. Step 3: Cross multiply
   20,784.28x = 31,175.48 × 7,635.69
4. Step 4: Simplify right side
   20,784.28x = 238,046,300.88
5. Step 5: Solve for x
   x = 238,046,300.88/20,784.28
6. Step 6: Final answer
   x = 11,453.19