Finding the Fourth Proportional to 3,511.89, 5,263.86 and 1,429.28

Step by Step Solution

1. Step 1: Write the proportion equation
   3,511.89 : 5,263.86 = 1,429.28 : x
2. Step 2: Convert to fraction form
   3,511.89/5,263.86 = 1,429.28/x
3. Step 3: Cross multiply
   3,511.89x = 5,263.86 × 1,429.28
4. Step 4: Simplify right side
   3,511.89x = 7,523,503.50
5. Step 5: Solve for x
   x = 7,523,503.50/3,511.89
6. Step 6: Final answer
   x = 2,142.29