Finding the Fourth Proportional to 7,091.31, 10,640.55 and 2,934.30

Step by Step Solution

1. Step 1: Write the proportion equation
   7,091.31 : 10,640.55 = 2,934.30 : x
2. Step 2: Convert to fraction form
   7,091.31/10,640.55 = 2,934.30/x
3. Step 3: Cross multiply
   7,091.31x = 10,640.55 × 2,934.30
4. Step 4: Simplify right side
   7,091.31x = 31,222,565.87
5. Step 5: Solve for x
   x = 31,222,565.87/7,091.31
6. Step 6: Final answer
   x = 4,402.93