Finding the Fourth Proportional to 19,673.72, 29,513.84 and 7,827.60

Step by Step Solution

1. Step 1: Write the proportion equation
   19,673.72 : 29,513.84 = 7,827.60 : x
2. Step 2: Convert to fraction form
   19,673.72/29,513.84 = 7,827.60/x
3. Step 3: Cross multiply
   19,673.72x = 29,513.84 × 7,827.60
4. Step 4: Simplify right side
   19,673.72x = 231,022,605.52
5. Step 5: Solve for x
   x = 231,022,605.52/19,673.72
6. Step 6: Final answer
   x = 11,742.70