Finding the Fourth Proportional to 1,528.91, 2,290.20 and 746.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,528.91 : 2,290.20 = 746.55 : x
2. Step 2: Convert to fraction form
   1,528.91/2,290.20 = 746.55/x
3. Step 3: Cross multiply
   1,528.91x = 2,290.20 × 746.55
4. Step 4: Simplify right side
   1,528.91x = 1,709,748.81
5. Step 5: Solve for x
   x = 1,709,748.81/1,528.91
6. Step 6: Final answer
   x = 1,118.28