Finding the Fourth Proportional to 10,591.05, 15,861.52 and 9,196.81

Step by Step Solution

1. Step 1: Write the proportion equation
   10,591.05 : 15,861.52 = 9,196.81 : x
2. Step 2: Convert to fraction form
   10,591.05/15,861.52 = 9,196.81/x
3. Step 3: Cross multiply
   10,591.05x = 15,861.52 × 9,196.81
4. Step 4: Simplify right side
   10,591.05x = 145,875,334.60
5. Step 5: Solve for x
   x = 145,875,334.60/10,591.05
6. Step 6: Final answer
   x = 13,773.46