Finding the Fourth Proportional to 3,526.50, 4,866.57 and 2,128.98

Step by Step Solution

1. Step 1: Write the proportion equation
   3,526.50 : 4,866.57 = 2,128.98 : x
2. Step 2: Convert to fraction form
   3,526.50/4,866.57 = 2,128.98/x
3. Step 3: Cross multiply
   3,526.50x = 4,866.57 × 2,128.98
4. Step 4: Simplify right side
   3,526.50x = 10,360,830.20
5. Step 5: Solve for x
   x = 10,360,830.20/3,526.50
6. Step 6: Final answer
   x = 2,937.99