Finding the Fourth Proportional to 1,875.32, 2,587.34 and 1,139.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,875.32 : 2,587.34 = 1,139.32 : x
2. Step 2: Convert to fraction form
   1,875.32/2,587.34 = 1,139.32/x
3. Step 3: Cross multiply
   1,875.32x = 2,587.34 × 1,139.32
4. Step 4: Simplify right side
   1,875.32x = 2,947,808.21
5. Step 5: Solve for x
   x = 2,947,808.21/1,875.32
6. Step 6: Final answer
   x = 1,571.90