Finding the Fourth Proportional to 1,356.86, 2,034.86 and 690.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,356.86 : 2,034.86 = 690.06 : x
2. Step 2: Convert to fraction form
   1,356.86/2,034.86 = 690.06/x
3. Step 3: Cross multiply
   1,356.86x = 2,034.86 × 690.06
4. Step 4: Simplify right side
   1,356.86x = 1,404,175.49
5. Step 5: Solve for x
   x = 1,404,175.49/1,356.86
6. Step 6: Final answer
   x = 1,034.87