Finding the Fourth Proportional to 12,861.08, 19,288.27 and 5,461.73

Step by Step Solution

1. Step 1: Write the proportion equation
   12,861.08 : 19,288.27 = 5,461.73 : x
2. Step 2: Convert to fraction form
   12,861.08/19,288.27 = 5,461.73/x
3. Step 3: Cross multiply
   12,861.08x = 19,288.27 × 5,461.73
4. Step 4: Simplify right side
   12,861.08x = 105,347,322.91
5. Step 5: Solve for x
   x = 105,347,322.91/12,861.08
6. Step 6: Final answer
   x = 8,191.17