Finding the Fourth Proportional to 2,574.59, 3,859.43 and 1,188.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,574.59 : 3,859.43 = 1,188.86 : x
2. Step 2: Convert to fraction form
   2,574.59/3,859.43 = 1,188.86/x
3. Step 3: Cross multiply
   2,574.59x = 3,859.43 × 1,188.86
4. Step 4: Simplify right side
   2,574.59x = 4,588,296.71
5. Step 5: Solve for x
   x = 4,588,296.71/2,574.59
6. Step 6: Final answer
   x = 1,782.15