Finding the Fourth Proportional to 1,492.56, 2,225.69 and 1,388.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,492.56 : 2,225.69 = 1,388.68 : x
2. Step 2: Convert to fraction form
   1,492.56/2,225.69 = 1,388.68/x
3. Step 3: Cross multiply
   1,492.56x = 2,225.69 × 1,388.68
4. Step 4: Simplify right side
   1,492.56x = 3,090,771.70
5. Step 5: Solve for x
   x = 3,090,771.70/1,492.56
6. Step 6: Final answer
   x = 2,070.79