Finding the Fourth Proportional to 5,145.59, 7,715.72 and 2,513.22

Step by Step Solution

1. Step 1: Write the proportion equation
   5,145.59 : 7,715.72 = 2,513.22 : x
2. Step 2: Convert to fraction form
   5,145.59/7,715.72 = 2,513.22/x
3. Step 3: Cross multiply
   5,145.59x = 7,715.72 × 2,513.22
4. Step 4: Simplify right side
   5,145.59x = 19,391,301.82
5. Step 5: Solve for x
   x = 19,391,301.82/5,145.59
6. Step 6: Final answer
   x = 3,768.53