Finding the Fourth Proportional to 1,145.73, 1,580.70 and 725.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,145.73 : 1,580.70 = 725.93 : x
2. Step 2: Convert to fraction form
   1,145.73/1,580.70 = 725.93/x
3. Step 3: Cross multiply
   1,145.73x = 1,580.70 × 725.93
4. Step 4: Simplify right side
   1,145.73x = 1,147,477.55
5. Step 5: Solve for x
   x = 1,147,477.55/1,145.73
6. Step 6: Final answer
   x = 1,001.53