Finding the Fourth Proportional to 1,156.86, 1,734.12 and 578.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,156.86 : 1,734.12 = 578.52 : x
2. Step 2: Convert to fraction form
   1,156.86/1,734.12 = 578.52/x
3. Step 3: Cross multiply
   1,156.86x = 1,734.12 × 578.52
4. Step 4: Simplify right side
   1,156.86x = 1,003,223.10
5. Step 5: Solve for x
   x = 1,003,223.10/1,156.86
6. Step 6: Final answer
   x = 867.19