Finding the Fourth Proportional to 2,580.69, 3,871.34 and 938.01

Step by Step Solution

1. Step 1: Write the proportion equation
   2,580.69 : 3,871.34 = 938.01 : x
2. Step 2: Convert to fraction form
   2,580.69/3,871.34 = 938.01/x
3. Step 3: Cross multiply
   2,580.69x = 3,871.34 × 938.01
4. Step 4: Simplify right side
   2,580.69x = 3,631,350.94
5. Step 5: Solve for x
   x = 3,631,350.94/2,580.69
6. Step 6: Final answer
   x = 1,407.12