Finding the Fourth Proportional to 1,551.42, 2,139.93 and 961.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,551.42 : 2,139.93 = 961.34 : x
2. Step 2: Convert to fraction form
   1,551.42/2,139.93 = 961.34/x
3. Step 3: Cross multiply
   1,551.42x = 2,139.93 × 961.34
4. Step 4: Simplify right side
   1,551.42x = 2,057,189.61
5. Step 5: Solve for x
   x = 2,057,189.61/1,551.42
6. Step 6: Final answer
   x = 1,326.00