Finding the Fourth Proportional to 1,820.55, 2,512.71 and 1,158.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,820.55 : 2,512.71 = 1,158.15 : x
2. Step 2: Convert to fraction form
   1,820.55/2,512.71 = 1,158.15/x
3. Step 3: Cross multiply
   1,820.55x = 2,512.71 × 1,158.15
4. Step 4: Simplify right side
   1,820.55x = 2,910,095.09
5. Step 5: Solve for x
   x = 2,910,095.09/1,820.55
6. Step 6: Final answer
   x = 1,598.47