Finding the Fourth Proportional to 2,715.12, 4,068.72 and 1,326.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,715.12 : 4,068.72 = 1,326.96 : x
2. Step 2: Convert to fraction form
   2,715.12/4,068.72 = 1,326.96/x
3. Step 3: Cross multiply
   2,715.12x = 4,068.72 × 1,326.96
4. Step 4: Simplify right side
   2,715.12x = 5,399,028.69
5. Step 5: Solve for x
   x = 5,399,028.69/2,715.12
6. Step 6: Final answer
   x = 1,988.50