Finding the Fourth Proportional to 3,131.84, 4,322.72 and 1,806.35

Step by Step Solution

1. Step 1: Write the proportion equation
   3,131.84 : 4,322.72 = 1,806.35 : x
2. Step 2: Convert to fraction form
   3,131.84/4,322.72 = 1,806.35/x
3. Step 3: Cross multiply
   3,131.84x = 4,322.72 × 1,806.35
4. Step 4: Simplify right side
   3,131.84x = 7,808,328.17
5. Step 5: Solve for x
   x = 7,808,328.17/3,131.84
6. Step 6: Final answer
   x = 2,493.21