Finding the Fourth Proportional to 3,646.06, 5,031.34 and 2,153.43

Step by Step Solution

1. Step 1: Write the proportion equation
   3,646.06 : 5,031.34 = 2,153.43 : x
2. Step 2: Convert to fraction form
   3,646.06/5,031.34 = 2,153.43/x
3. Step 3: Cross multiply
   3,646.06x = 5,031.34 × 2,153.43
4. Step 4: Simplify right side
   3,646.06x = 10,834,638.50
5. Step 5: Solve for x
   x = 10,834,638.50/3,646.06
6. Step 6: Final answer
   x = 2,971.60