Finding the Fourth Proportional to 1,160.55, 1,742.04 and 612.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,160.55 : 1,742.04 = 612.59 : x
2. Step 2: Convert to fraction form
   1,160.55/1,742.04 = 612.59/x
3. Step 3: Cross multiply
   1,160.55x = 1,742.04 × 612.59
4. Step 4: Simplify right side
   1,160.55x = 1,067,156.28
5. Step 5: Solve for x
   x = 1,067,156.28/1,160.55
6. Step 6: Final answer
   x = 919.53