Finding the Fourth Proportional to 1,892.88, 2,840.85 and 918.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,892.88 : 2,840.85 = 918.98 : x
2. Step 2: Convert to fraction form
   1,892.88/2,840.85 = 918.98/x
3. Step 3: Cross multiply
   1,892.88x = 2,840.85 × 918.98
4. Step 4: Simplify right side
   1,892.88x = 2,610,684.33
5. Step 5: Solve for x
   x = 2,610,684.33/1,892.88
6. Step 6: Final answer
   x = 1,379.21