Finding the Fourth Proportional to 2,617.90, 3,923.55 and 1,385.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,617.90 : 3,923.55 = 1,385.86 : x
2. Step 2: Convert to fraction form
   2,617.90/3,923.55 = 1,385.86/x
3. Step 3: Cross multiply
   2,617.90x = 3,923.55 × 1,385.86
4. Step 4: Simplify right side
   2,617.90x = 5,437,491.00
5. Step 5: Solve for x
   x = 5,437,491.00/2,617.90
6. Step 6: Final answer
   x = 2,077.04