Finding the Fourth Proportional to 1,357.02, 2,037.15 and 872.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,357.02 : 2,037.15 = 872.10 : x
2. Step 2: Convert to fraction form
   1,357.02/2,037.15 = 872.10/x
3. Step 3: Cross multiply
   1,357.02x = 2,037.15 × 872.10
4. Step 4: Simplify right side
   1,357.02x = 1,776,598.52
5. Step 5: Solve for x
   x = 1,776,598.52/1,357.02
6. Step 6: Final answer
   x = 1,309.19