Finding the Fourth Proportional to 3,696.61, 5,100.56 and 2,124.40

Step by Step Solution

1. Step 1: Write the proportion equation
   3,696.61 : 5,100.56 = 2,124.40 : x
2. Step 2: Convert to fraction form
   3,696.61/5,100.56 = 2,124.40/x
3. Step 3: Cross multiply
   3,696.61x = 5,100.56 × 2,124.40
4. Step 4: Simplify right side
   3,696.61x = 10,835,611.60
5. Step 5: Solve for x
   x = 10,835,611.60/3,696.61
6. Step 6: Final answer
   x = 2,931.23