Finding the Fourth Proportional to 1,729.56, 2,384.64 and 1,139.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,729.56 : 2,384.64 = 1,139.16 : x
2. Step 2: Convert to fraction form
   1,729.56/2,384.64 = 1,139.16/x
3. Step 3: Cross multiply
   1,729.56x = 2,384.64 × 1,139.16
4. Step 4: Simplify right side
   1,729.56x = 2,716,486.50
5. Step 5: Solve for x
   x = 2,716,486.50/1,729.56
6. Step 6: Final answer
   x = 1,570.62