Finding the Fourth Proportional to 1,158.32, 1,734.56 and 1,055.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,158.32 : 1,734.56 = 1,055.76 : x
2. Step 2: Convert to fraction form
   1,158.32/1,734.56 = 1,055.76/x
3. Step 3: Cross multiply
   1,158.32x = 1,734.56 × 1,055.76
4. Step 4: Simplify right side
   1,158.32x = 1,831,279.07
5. Step 5: Solve for x
   x = 1,831,279.07/1,158.32
6. Step 6: Final answer
   x = 1,580.98