Finding the Fourth Proportional to 1,081.24, 1,608.55 and 1,077.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,081.24 : 1,608.55 = 1,077.40 : x
2. Step 2: Convert to fraction form
   1,081.24/1,608.55 = 1,077.40/x
3. Step 3: Cross multiply
   1,081.24x = 1,608.55 × 1,077.40
4. Step 4: Simplify right side
   1,081.24x = 1,733,051.77
5. Step 5: Solve for x
   x = 1,733,051.77/1,081.24
6. Step 6: Final answer
   x = 1,602.84