Finding the Fourth Proportional to 3,705.72, 5,114.10 and 2,112.45

Step by Step Solution

1. Step 1: Write the proportion equation
   3,705.72 : 5,114.10 = 2,112.45 : x
2. Step 2: Convert to fraction form
   3,705.72/5,114.10 = 2,112.45/x
3. Step 3: Cross multiply
   3,705.72x = 5,114.10 × 2,112.45
4. Step 4: Simplify right side
   3,705.72x = 10,803,280.55
5. Step 5: Solve for x
   x = 10,803,280.55/3,705.72
6. Step 6: Final answer
   x = 2,915.30