Finding the Fourth Proportional to 1,611.54, 2,411.84 and 1,247.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,611.54 : 2,411.84 = 1,247.96 : x
2. Step 2: Convert to fraction form
   1,611.54/2,411.84 = 1,247.96/x
3. Step 3: Cross multiply
   1,611.54x = 2,411.84 × 1,247.96
4. Step 4: Simplify right side
   1,611.54x = 3,009,861.55
5. Step 5: Solve for x
   x = 3,009,861.55/1,611.54
6. Step 6: Final answer
   x = 1,867.69