Finding the Fourth Proportional to 10,155.83, 13,983.89 and 8,889.80

Step by Step Solution

1. Step 1: Write the proportion equation
   10,155.83 : 13,983.89 = 8,889.80 : x
2. Step 2: Convert to fraction form
   10,155.83/13,983.89 = 8,889.80/x
3. Step 3: Cross multiply
   10,155.83x = 13,983.89 × 8,889.80
4. Step 4: Simplify right side
   10,155.83x = 124,313,985.32
5. Step 5: Solve for x
   x = 124,313,985.32/10,155.83
6. Step 6: Final answer
   x = 12,240.65