Finding the Fourth Proportional to 2,333.80, 3,501.38 and 690.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,333.80 : 3,501.38 = 690.39 : x
2. Step 2: Convert to fraction form
   2,333.80/3,501.38 = 690.39/x
3. Step 3: Cross multiply
   2,333.80x = 3,501.38 × 690.39
4. Step 4: Simplify right side
   2,333.80x = 2,417,300.23
5. Step 5: Solve for x
   x = 2,417,300.23/2,333.80
6. Step 6: Final answer
   x = 1,035.78