Finding the Fourth Proportional to 2,075.07, 3,111.93 and 688.14

Step by Step Solution

1. Step 1: Write the proportion equation
   2,075.07 : 3,111.93 = 688.14 : x
2. Step 2: Convert to fraction form
   2,075.07/3,111.93 = 688.14/x
3. Step 3: Cross multiply
   2,075.07x = 3,111.93 × 688.14
4. Step 4: Simplify right side
   2,075.07x = 2,141,443.51
5. Step 5: Solve for x
   x = 2,141,443.51/2,075.07
6. Step 6: Final answer
   x = 1,031.99