Finding the Fourth Proportional to 1,156.78, 1,595.70 and 713.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,156.78 : 1,595.70 = 713.89 : x
2. Step 2: Convert to fraction form
   1,156.78/1,595.70 = 713.89/x
3. Step 3: Cross multiply
   1,156.78x = 1,595.70 × 713.89
4. Step 4: Simplify right side
   1,156.78x = 1,139,154.27
5. Step 5: Solve for x
   x = 1,139,154.27/1,156.78
6. Step 6: Final answer
   x = 984.76