Finding the Fourth Proportional to 19,636.61, 29,435.87 and 7,786.50

Step by Step Solution

1. Step 1: Write the proportion equation
   19,636.61 : 29,435.87 = 7,786.50 : x
2. Step 2: Convert to fraction form
   19,636.61/29,435.87 = 7,786.50/x
3. Step 3: Cross multiply
   19,636.61x = 29,435.87 × 7,786.50
4. Step 4: Simplify right side
   19,636.61x = 229,202,362.82
5. Step 5: Solve for x
   x = 229,202,362.82/19,636.61
6. Step 6: Final answer
   x = 11,672.20