Finding the Fourth Proportional to 1,851.86, 2,775.69 and 618.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,851.86 : 2,775.69 = 618.98 : x
2. Step 2: Convert to fraction form
   1,851.86/2,775.69 = 618.98/x
3. Step 3: Cross multiply
   1,851.86x = 2,775.69 × 618.98
4. Step 4: Simplify right side
   1,851.86x = 1,718,082.72
5. Step 5: Solve for x
   x = 1,718,082.72/1,851.86
6. Step 6: Final answer
   x = 927.76