Finding the Fourth Proportional to 1,561.17, 2,341.29 and 1,286.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,561.17 : 2,341.29 = 1,286.58 : x
2. Step 2: Convert to fraction form
   1,561.17/2,341.29 = 1,286.58/x
3. Step 3: Cross multiply
   1,561.17x = 2,341.29 × 1,286.58
4. Step 4: Simplify right side
   1,561.17x = 3,012,256.89
5. Step 5: Solve for x
   x = 3,012,256.89/1,561.17
6. Step 6: Final answer
   x = 1,929.49