Finding the Fourth Proportional to 11,861.55, 17,797.86 and 5,287.05

Step by Step Solution

1. Step 1: Write the proportion equation
   11,861.55 : 17,797.86 = 5,287.05 : x
2. Step 2: Convert to fraction form
   11,861.55/17,797.86 = 5,287.05/x
3. Step 3: Cross multiply
   11,861.55x = 17,797.86 × 5,287.05
4. Step 4: Simplify right side
   11,861.55x = 94,098,175.71
5. Step 5: Solve for x
   x = 94,098,175.71/11,861.55
6. Step 6: Final answer
   x = 7,933.04