Finding the Fourth Proportional to 2,083.98, 3,125.94 and 987.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,083.98 : 3,125.94 = 987.78 : x
2. Step 2: Convert to fraction form
   2,083.98/3,125.94 = 987.78/x
3. Step 3: Cross multiply
   2,083.98x = 3,125.94 × 987.78
4. Step 4: Simplify right side
   2,083.98x = 3,087,741.01
5. Step 5: Solve for x
   x = 3,087,741.01/2,083.98
6. Step 6: Final answer
   x = 1,481.66