Finding the Fourth Proportional to 1,162.78, 1,742.75 and 614.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,162.78 : 1,742.75 = 614.61 : x
2. Step 2: Convert to fraction form
   1,162.78/1,742.75 = 614.61/x
3. Step 3: Cross multiply
   1,162.78x = 1,742.75 × 614.61
4. Step 4: Simplify right side
   1,162.78x = 1,071,111.58
5. Step 5: Solve for x
   x = 1,071,111.58/1,162.78
6. Step 6: Final answer
   x = 921.16