Finding the Fourth Proportional to 2,643.86, 3,649.34 and 1,525.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,643.86 : 3,649.34 = 1,525.55 : x
2. Step 2: Convert to fraction form
   2,643.86/3,649.34 = 1,525.55/x
3. Step 3: Cross multiply
   2,643.86x = 3,649.34 × 1,525.55
4. Step 4: Simplify right side
   2,643.86x = 5,567,224.76
5. Step 5: Solve for x
   x = 5,567,224.76/2,643.86
6. Step 6: Final answer
   x = 2,105.72