Finding the Fourth Proportional to 3,886.50, 5,830.59 and 1,421.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,886.50 : 5,830.59 = 1,421.31 : x
2. Step 2: Convert to fraction form
   3,886.50/5,830.59 = 1,421.31/x
3. Step 3: Cross multiply
   3,886.50x = 5,830.59 × 1,421.31
4. Step 4: Simplify right side
   3,886.50x = 8,287,075.87
5. Step 5: Solve for x
   x = 8,287,075.87/3,886.50
6. Step 6: Final answer
   x = 2,132.27