Finding the Fourth Proportional to 2,085.87, 3,126.62 and 988.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.87 : 3,126.62 = 988.94 : x
2. Step 2: Convert to fraction form
   2,085.87/3,126.62 = 988.94/x
3. Step 3: Cross multiply
   2,085.87x = 3,126.62 × 988.94
4. Step 4: Simplify right side
   2,085.87x = 3,092,019.01
5. Step 5: Solve for x
   x = 3,092,019.01/2,085.87
6. Step 6: Final answer
   x = 1,482.36