Finding the Fourth Proportional to 1,685.89, 2,530.59 and 1,492.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,685.89 : 2,530.59 = 1,492.21 : x
2. Step 2: Convert to fraction form
   1,685.89/2,530.59 = 1,492.21/x
3. Step 3: Cross multiply
   1,685.89x = 2,530.59 × 1,492.21
4. Step 4: Simplify right side
   1,685.89x = 3,776,171.70
5. Step 5: Solve for x
   x = 3,776,171.70/1,685.89
6. Step 6: Final answer
   x = 2,239.87