Finding the Fourth Proportional to 3,802.72, 5,247.60 and 2,124.10

Step by Step Solution

1. Step 1: Write the proportion equation
   3,802.72 : 5,247.60 = 2,124.10 : x
2. Step 2: Convert to fraction form
   3,802.72/5,247.60 = 2,124.10/x
3. Step 3: Cross multiply
   3,802.72x = 5,247.60 × 2,124.10
4. Step 4: Simplify right side
   3,802.72x = 11,146,427.16
5. Step 5: Solve for x
   x = 11,146,427.16/3,802.72
6. Step 6: Final answer
   x = 2,931.17