Finding the Fourth Proportional to 2,485.90, 3,729.86 and 1,253.67

Step by Step Solution

1. Step 1: Write the proportion equation
   2,485.90 : 3,729.86 = 1,253.67 : x
2. Step 2: Convert to fraction form
   2,485.90/3,729.86 = 1,253.67/x
3. Step 3: Cross multiply
   2,485.90x = 3,729.86 × 1,253.67
4. Step 4: Simplify right side
   2,485.90x = 4,676,013.59
5. Step 5: Solve for x
   x = 4,676,013.59/2,485.90
6. Step 6: Final answer
   x = 1,881.01