Finding the Fourth Proportional to 1,812.49, 2,499.31 and 1,369.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,812.49 : 2,499.31 = 1,369.69 : x
2. Step 2: Convert to fraction form
   1,812.49/2,499.31 = 1,369.69/x
3. Step 3: Cross multiply
   1,812.49x = 2,499.31 × 1,369.69
4. Step 4: Simplify right side
   1,812.49x = 3,423,279.91
5. Step 5: Solve for x
   x = 3,423,279.91/1,812.49
6. Step 6: Final answer
   x = 1,888.72