Finding the Fourth Proportional to 13,890.59, 19,169.24 and 7,841.15

Step by Step Solution

1. Step 1: Write the proportion equation
   13,890.59 : 19,169.24 = 7,841.15 : x
2. Step 2: Convert to fraction form
   13,890.59/19,169.24 = 7,841.15/x
3. Step 3: Cross multiply
   13,890.59x = 19,169.24 × 7,841.15
4. Step 4: Simplify right side
   13,890.59x = 150,308,823.06
5. Step 5: Solve for x
   x = 150,308,823.06/13,890.59
6. Step 6: Final answer
   x = 10,820.91