Finding the Fourth Proportional to 2,542.21, 3,802.78 and 2,386.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,542.21 : 3,802.78 = 2,386.69 : x
2. Step 2: Convert to fraction form
   2,542.21/3,802.78 = 2,386.69/x
3. Step 3: Cross multiply
   2,542.21x = 3,802.78 × 2,386.69
4. Step 4: Simplify right side
   2,542.21x = 9,076,050.47
5. Step 5: Solve for x
   x = 9,076,050.47/2,542.21
6. Step 6: Final answer
   x = 3,570.15