Finding the Fourth Proportional to 19,789.60, 29,681.16 and 7,315.46

Step by Step Solution

1. Step 1: Write the proportion equation
   19,789.60 : 29,681.16 = 7,315.46 : x
2. Step 2: Convert to fraction form
   19,789.60/29,681.16 = 7,315.46/x
3. Step 3: Cross multiply
   19,789.60x = 29,681.16 × 7,315.46
4. Step 4: Simplify right side
   19,789.60x = 217,131,338.73
5. Step 5: Solve for x
   x = 217,131,338.73/19,789.60
6. Step 6: Final answer
   x = 10,971.99