Finding the Fourth Proportional to 1,357.16, 1,874.59 and 1,003.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,357.16 : 1,874.59 = 1,003.59 : x
2. Step 2: Convert to fraction form
   1,357.16/1,874.59 = 1,003.59/x
3. Step 3: Cross multiply
   1,357.16x = 1,874.59 × 1,003.59
4. Step 4: Simplify right side
   1,357.16x = 1,881,322.91
5. Step 5: Solve for x
   x = 1,881,322.91/1,357.16
6. Step 6: Final answer
   x = 1,386.23