Finding the Fourth Proportional to 13,809.67, 19,057.56 and 7,841.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,809.67 : 19,057.56 = 7,841.50 : x
2. Step 2: Convert to fraction form
   13,809.67/19,057.56 = 7,841.50/x
3. Step 3: Cross multiply
   13,809.67x = 19,057.56 × 7,841.50
4. Step 4: Simplify right side
   13,809.67x = 149,439,856.74
5. Step 5: Solve for x
   x = 149,439,856.74/13,809.67
6. Step 6: Final answer
   x = 10,821.39