Finding the Fourth Proportional to 3,499.50, 4,827.78 and 2,153.91

Step by Step Solution

1. Step 1: Write the proportion equation
   3,499.50 : 4,827.78 = 2,153.91 : x
2. Step 2: Convert to fraction form
   3,499.50/4,827.78 = 2,153.91/x
3. Step 3: Cross multiply
   3,499.50x = 4,827.78 × 2,153.91
4. Step 4: Simplify right side
   3,499.50x = 10,398,603.62
5. Step 5: Solve for x
   x = 10,398,603.62/3,499.50
6. Step 6: Final answer
   x = 2,971.45