Finding the Fourth Proportional to 1,528.90, 2,111.60 and 1,033.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,528.90 : 2,111.60 = 1,033.58 : x
2. Step 2: Convert to fraction form
   1,528.90/2,111.60 = 1,033.58/x
3. Step 3: Cross multiply
   1,528.90x = 2,111.60 × 1,033.58
4. Step 4: Simplify right side
   1,528.90x = 2,182,507.53
5. Step 5: Solve for x
   x = 2,182,507.53/1,528.90
6. Step 6: Final answer
   x = 1,427.50