Finding the Fourth Proportional to 1,153.91, 1,590.57 and 943.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,153.91 : 1,590.57 = 943.72 : x
2. Step 2: Convert to fraction form
   1,153.91/1,590.57 = 943.72/x
3. Step 3: Cross multiply
   1,153.91x = 1,590.57 × 943.72
4. Step 4: Simplify right side
   1,153.91x = 1,501,048.74
5. Step 5: Solve for x
   x = 1,501,048.74/1,153.91
6. Step 6: Final answer
   x = 1,300.83