Finding the Fourth Proportional to 2,934.61, 4,400.69 and 1,087.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,934.61 : 4,400.69 = 1,087.20 : x
2. Step 2: Convert to fraction form
   2,934.61/4,400.69 = 1,087.20/x
3. Step 3: Cross multiply
   2,934.61x = 4,400.69 × 1,087.20
4. Step 4: Simplify right side
   2,934.61x = 4,784,432.89
5. Step 5: Solve for x
   x = 4,784,432.89/2,934.61
6. Step 6: Final answer
   x = 1,630.35