Finding the Fourth Proportional to 1,988.89, 2,983.72 and 756.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,988.89 : 2,983.72 = 756.20 : x
2. Step 2: Convert to fraction form
   1,988.89/2,983.72 = 756.20/x
3. Step 3: Cross multiply
   1,988.89x = 2,983.72 × 756.20
4. Step 4: Simplify right side
   1,988.89x = 2,256,300.01
5. Step 5: Solve for x
   x = 2,256,300.01/1,988.89
6. Step 6: Final answer
   x = 1,134.45