Finding the Fourth Proportional to 8,790.99, 12,131.59 and 4,812.36

Step by Step Solution

1. Step 1: Write the proportion equation
   8,790.99 : 12,131.59 = 4,812.36 : x
2. Step 2: Convert to fraction form
   8,790.99/12,131.59 = 4,812.36/x
3. Step 3: Cross multiply
   8,790.99x = 12,131.59 × 4,812.36
4. Step 4: Simplify right side
   8,790.99x = 58,381,578.45
5. Step 5: Solve for x
   x = 58,381,578.45/8,790.99
6. Step 6: Final answer
   x = 6,641.07