Finding the Fourth Proportional to 1,156.01, 1,734.55 and 578.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,156.01 : 1,734.55 = 578.88 : x
2. Step 2: Convert to fraction form
   1,156.01/1,734.55 = 578.88/x
3. Step 3: Cross multiply
   1,156.01x = 1,734.55 × 578.88
4. Step 4: Simplify right side
   1,156.01x = 1,004,094.86
5. Step 5: Solve for x
   x = 1,004,094.86/1,156.01
6. Step 6: Final answer
   x = 868.59