Finding the Fourth Proportional to 3,859.51, 5,320.54 and 2,530.91

Step by Step Solution

1. Step 1: Write the proportion equation
   3,859.51 : 5,320.54 = 2,530.91 : x
2. Step 2: Convert to fraction form
   3,859.51/5,320.54 = 2,530.91/x
3. Step 3: Cross multiply
   3,859.51x = 5,320.54 × 2,530.91
4. Step 4: Simplify right side
   3,859.51x = 13,465,807.89
5. Step 5: Solve for x
   x = 13,465,807.89/3,859.51
6. Step 6: Final answer
   x = 3,488.99