Finding the Fourth Proportional to 2,142.37, 3,211.08 and 907.93

Step by Step Solution

1. Step 1: Write the proportion equation
   2,142.37 : 3,211.08 = 907.93 : x
2. Step 2: Convert to fraction form
   2,142.37/3,211.08 = 907.93/x
3. Step 3: Cross multiply
   2,142.37x = 3,211.08 × 907.93
4. Step 4: Simplify right side
   2,142.37x = 2,915,435.86
5. Step 5: Solve for x
   x = 2,915,435.86/2,142.37
6. Step 6: Final answer
   x = 1,360.85