Finding the Fourth Proportional to 2,485.84, 3,722.28 and 1,385.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,485.84 : 3,722.28 = 1,385.86 : x
2. Step 2: Convert to fraction form
   2,485.84/3,722.28 = 1,385.86/x
3. Step 3: Cross multiply
   2,485.84x = 3,722.28 × 1,385.86
4. Step 4: Simplify right side
   2,485.84x = 5,158,558.96
5. Step 5: Solve for x
   x = 5,158,558.96/2,485.84
6. Step 6: Final answer
   x = 2,075.18