Finding the Fourth Proportional to 11,155.90, 16,741.94 and 8,990.77

Step by Step Solution

1. Step 1: Write the proportion equation
   11,155.90 : 16,741.94 = 8,990.77 : x
2. Step 2: Convert to fraction form
   11,155.90/16,741.94 = 8,990.77/x
3. Step 3: Cross multiply
   11,155.90x = 16,741.94 × 8,990.77
4. Step 4: Simplify right side
   11,155.90x = 150,522,931.89
5. Step 5: Solve for x
   x = 150,522,931.89/11,155.90
6. Step 6: Final answer
   x = 13,492.67