Finding the Fourth Proportional to 1,387.04, 1,910.24 and 1,152.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,387.04 : 1,910.24 = 1,152.02 : x
2. Step 2: Convert to fraction form
   1,387.04/1,910.24 = 1,152.02/x
3. Step 3: Cross multiply
   1,387.04x = 1,910.24 × 1,152.02
4. Step 4: Simplify right side
   1,387.04x = 2,200,634.68
5. Step 5: Solve for x
   x = 2,200,634.68/1,387.04
6. Step 6: Final answer
   x = 1,586.57