Finding the Fourth Proportional to 1,690.72, 2,535.89 and 536.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,690.72 : 2,535.89 = 536.38 : x
2. Step 2: Convert to fraction form
   1,690.72/2,535.89 = 536.38/x
3. Step 3: Cross multiply
   1,690.72x = 2,535.89 × 536.38
4. Step 4: Simplify right side
   1,690.72x = 1,360,200.68
5. Step 5: Solve for x
   x = 1,360,200.68/1,690.72
6. Step 6: Final answer
   x = 804.51