Finding the Fourth Proportional to 1,599.92, 2,207.24 and 1,128.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,599.92 : 2,207.24 = 1,128.50 : x
2. Step 2: Convert to fraction form
   1,599.92/2,207.24 = 1,128.50/x
3. Step 3: Cross multiply
   1,599.92x = 2,207.24 × 1,128.50
4. Step 4: Simplify right side
   1,599.92x = 2,490,870.34
5. Step 5: Solve for x
   x = 2,490,870.34/1,599.92
6. Step 6: Final answer
   x = 1,556.87