Finding the Fourth Proportional to 2,807.88, 4,210.89 and 933.35

Step by Step Solution

1. Step 1: Write the proportion equation
   2,807.88 : 4,210.89 = 933.35 : x
2. Step 2: Convert to fraction form
   2,807.88/4,210.89 = 933.35/x
3. Step 3: Cross multiply
   2,807.88x = 4,210.89 × 933.35
4. Step 4: Simplify right side
   2,807.88x = 3,930,234.18
5. Step 5: Solve for x
   x = 3,930,234.18/2,807.88
6. Step 6: Final answer
   x = 1,399.72