Finding the Fourth Proportional to 1,123.86, 1,551.07 and 681.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.86 : 1,551.07 = 681.74 : x
2. Step 2: Convert to fraction form
   1,123.86/1,551.07 = 681.74/x
3. Step 3: Cross multiply
   1,123.86x = 1,551.07 × 681.74
4. Step 4: Simplify right side
   1,123.86x = 1,057,415.30
5. Step 5: Solve for x
   x = 1,057,415.30/1,123.86
6. Step 6: Final answer
   x = 940.88