Finding the Fourth Proportional to 2,086.05, 3,126.69 and 988.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,086.05 : 3,126.69 = 988.86 : x
2. Step 2: Convert to fraction form
   2,086.05/3,126.69 = 988.86/x
3. Step 3: Cross multiply
   2,086.05x = 3,126.69 × 988.86
4. Step 4: Simplify right side
   2,086.05x = 3,091,858.67
5. Step 5: Solve for x
   x = 3,091,858.67/2,086.05
6. Step 6: Final answer
   x = 1,482.16