Finding the Fourth Proportional to 1,357.10, 2,029.55 and 991.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,357.10 : 2,029.55 = 991.52 : x
2. Step 2: Convert to fraction form
   1,357.10/2,029.55 = 991.52/x
3. Step 3: Cross multiply
   1,357.10x = 2,029.55 × 991.52
4. Step 4: Simplify right side
   1,357.10x = 2,012,339.42
5. Step 5: Solve for x
   x = 2,012,339.42/1,357.10
6. Step 6: Final answer
   x = 1,482.82