Finding the Fourth Proportional to 12,113, 16,716.90 and 7,145.96

Step by Step Solution

1. Step 1: Write the proportion equation
   12,113 : 16,716.90 = 7,145.96 : x
2. Step 2: Convert to fraction form
   12,113/16,716.90 = 7,145.96/x
3. Step 3: Cross multiply
   12,113x = 16,716.90 × 7,145.96
4. Step 4: Simplify right side
   12,113x = 119,458,298.72
5. Step 5: Solve for x
   x = 119,458,298.72/12,113
6. Step 6: Final answer
   x = 9,861.99