Finding the Fourth Proportional to 21,719.82, 32,581.71 and 7,678.37

Step by Step Solution

1. Step 1: Write the proportion equation
   21,719.82 : 32,581.71 = 7,678.37 : x
2. Step 2: Convert to fraction form
   21,719.82/32,581.71 = 7,678.37/x
3. Step 3: Cross multiply
   21,719.82x = 32,581.71 × 7,678.37
4. Step 4: Simplify right side
   21,719.82x = 250,174,424.61
5. Step 5: Solve for x
   x = 250,174,424.61/21,719.82
6. Step 6: Final answer
   x = 11,518.25