Finding the Fourth Proportional to 11,678.00, 16,111.42 and 8,990.04

Step by Step Solution

1. Step 1: Write the proportion equation
   11,678.00 : 16,111.42 = 8,990.04 : x
2. Step 2: Convert to fraction form
   11,678.00/16,111.42 = 8,990.04/x
3. Step 3: Cross multiply
   11,678.00x = 16,111.42 × 8,990.04
4. Step 4: Simplify right side
   11,678.00x = 144,842,184.75
5. Step 5: Solve for x
   x = 144,842,184.75/11,678.00
6. Step 6: Final answer
   x = 12,403.00