Finding the Fourth Proportional to 2,485.72, 3,430.45 and 1,366.77

Step by Step Solution

1. Step 1: Write the proportion equation
   2,485.72 : 3,430.45 = 1,366.77 : x
2. Step 2: Convert to fraction form
   2,485.72/3,430.45 = 1,366.77/x
3. Step 3: Cross multiply
   2,485.72x = 3,430.45 × 1,366.77
4. Step 4: Simplify right side
   2,485.72x = 4,688,650.72
5. Step 5: Solve for x
   x = 4,688,650.72/2,485.72
6. Step 6: Final answer
   x = 1,886.23