Finding the Fourth Proportional to 1,158.89, 1,598.67 and 785.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,158.89 : 1,598.67 = 785.88 : x
2. Step 2: Convert to fraction form
   1,158.89/1,598.67 = 785.88/x
3. Step 3: Cross multiply
   1,158.89x = 1,598.67 × 785.88
4. Step 4: Simplify right side
   1,158.89x = 1,256,362.78
5. Step 5: Solve for x
   x = 1,256,362.78/1,158.89
6. Step 6: Final answer
   x = 1,084.11