Finding the Fourth Proportional to 3,802.61, 5,247.55 and 2,124.05

Step by Step Solution

1. Step 1: Write the proportion equation
   3,802.61 : 5,247.55 = 2,124.05 : x
2. Step 2: Convert to fraction form
   3,802.61/5,247.55 = 2,124.05/x
3. Step 3: Cross multiply
   3,802.61x = 5,247.55 × 2,124.05
4. Step 4: Simplify right side
   3,802.61x = 11,146,038.27
5. Step 5: Solve for x
   x = 11,146,038.27/3,802.61
6. Step 6: Final answer
   x = 2,931.15