Finding the Fourth Proportional to 3,718.50, 5,131.72 and 2,125.30

Step by Step Solution

1. Step 1: Write the proportion equation
   3,718.50 : 5,131.72 = 2,125.30 : x
2. Step 2: Convert to fraction form
   3,718.50/5,131.72 = 2,125.30/x
3. Step 3: Cross multiply
   3,718.50x = 5,131.72 × 2,125.30
4. Step 4: Simplify right side
   3,718.50x = 10,906,444.52
5. Step 5: Solve for x
   x = 10,906,444.52/3,718.50
6. Step 6: Final answer
   x = 2,933.02