Finding the Fourth Proportional to 1,100.87, 1,650.38 and 515.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,100.87 : 1,650.38 = 515.58 : x
2. Step 2: Convert to fraction form
   1,100.87/1,650.38 = 515.58/x
3. Step 3: Cross multiply
   1,100.87x = 1,650.38 × 515.58
4. Step 4: Simplify right side
   1,100.87x = 850,904.21
5. Step 5: Solve for x
   x = 850,904.21/1,100.87
6. Step 6: Final answer
   x = 772.94