Finding the Fourth Proportional to 12,866.49, 19,300.59 and 5,080.77

Step by Step Solution

1. Step 1: Write the proportion equation
   12,866.49 : 19,300.59 = 5,080.77 : x
2. Step 2: Convert to fraction form
   12,866.49/19,300.59 = 5,080.77/x
3. Step 3: Cross multiply
   12,866.49x = 19,300.59 × 5,080.77
4. Step 4: Simplify right side
   12,866.49x = 98,061,858.65
5. Step 5: Solve for x
   x = 98,061,858.65/12,866.49
6. Step 6: Final answer
   x = 7,621.49