Finding the Fourth Proportional to 12,746.65, 17,591.56 and 7,712.11

Step by Step Solution

1. Step 1: Write the proportion equation
   12,746.65 : 17,591.56 = 7,712.11 : x
2. Step 2: Convert to fraction form
   12,746.65/17,591.56 = 7,712.11/x
3. Step 3: Cross multiply
   12,746.65x = 17,591.56 × 7,712.11
4. Step 4: Simplify right side
   12,746.65x = 135,667,957.83
5. Step 5: Solve for x
   x = 135,667,957.83/12,746.65
6. Step 6: Final answer
   x = 10,643.42