Finding the Fourth Proportional to 2,485.64, 3,430.15 and 1,366.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,485.64 : 3,430.15 = 1,366.61 : x
2. Step 2: Convert to fraction form
   2,485.64/3,430.15 = 1,366.61/x
3. Step 3: Cross multiply
   2,485.64x = 3,430.15 × 1,366.61
4. Step 4: Simplify right side
   2,485.64x = 4,687,656.72
5. Step 5: Solve for x
   x = 4,687,656.72/2,485.64
6. Step 6: Final answer
   x = 1,885.89