Finding the Fourth Proportional to 2,270.54, 3,131.93 and 1,561.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,270.54 : 3,131.93 = 1,561.15 : x
2. Step 2: Convert to fraction form
   2,270.54/3,131.93 = 1,561.15/x
3. Step 3: Cross multiply
   2,270.54x = 3,131.93 × 1,561.15
4. Step 4: Simplify right side
   2,270.54x = 4,889,420.34
5. Step 5: Solve for x
   x = 4,889,420.34/2,270.54
6. Step 6: Final answer
   x = 2,153.42