Finding the Fourth Proportional to 1,761.46, 2,429.74 and 1,131.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,761.46 : 2,429.74 = 1,131.78 : x
2. Step 2: Convert to fraction form
   1,761.46/2,429.74 = 1,131.78/x
3. Step 3: Cross multiply
   1,761.46x = 2,429.74 × 1,131.78
4. Step 4: Simplify right side
   1,761.46x = 2,749,931.14
5. Step 5: Solve for x
   x = 2,749,931.14/1,761.46
6. Step 6: Final answer
   x = 1,561.17