Finding the Fourth Proportional to 13,091.94, 18,061.83 and 9,313.92

Step by Step Solution

1. Step 1: Write the proportion equation
   13,091.94 : 18,061.83 = 9,313.92 : x
2. Step 2: Convert to fraction form
   13,091.94/18,061.83 = 9,313.92/x
3. Step 3: Cross multiply
   13,091.94x = 18,061.83 × 9,313.92
4. Step 4: Simplify right side
   13,091.94x = 168,226,439.67
5. Step 5: Solve for x
   x = 168,226,439.67/13,091.94
6. Step 6: Final answer
   x = 12,849.62