Finding the Fourth Proportional to 1,736.65, 2,396.69 and 1,139.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,736.65 : 2,396.69 = 1,139.50 : x
2. Step 2: Convert to fraction form
   1,736.65/2,396.69 = 1,139.50/x
3. Step 3: Cross multiply
   1,736.65x = 2,396.69 × 1,139.50
4. Step 4: Simplify right side
   1,736.65x = 2,731,028.26
5. Step 5: Solve for x
   x = 2,731,028.26/1,736.65
6. Step 6: Final answer
   x = 1,572.58