Finding the Fourth Proportional to 1,399.52, 1,930.08 and 875.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,399.52 : 1,930.08 = 875.60 : x
2. Step 2: Convert to fraction form
   1,399.52/1,930.08 = 875.60/x
3. Step 3: Cross multiply
   1,399.52x = 1,930.08 × 875.60
4. Step 4: Simplify right side
   1,399.52x = 1,689,978.05
5. Step 5: Solve for x
   x = 1,689,978.05/1,399.52
6. Step 6: Final answer
   x = 1,207.54