Finding the Fourth Proportional to 2,429.68, 3,636.52 and 2,091.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,429.68 : 3,636.52 = 2,091.76 : x
2. Step 2: Convert to fraction form
   2,429.68/3,636.52 = 2,091.76/x
3. Step 3: Cross multiply
   2,429.68x = 3,636.52 × 2,091.76
4. Step 4: Simplify right side
   2,429.68x = 7,606,727.08
5. Step 5: Solve for x
   x = 7,606,727.08/2,429.68
6. Step 6: Final answer
   x = 3,130.75