Finding the Fourth Proportional to 3,605.31, 5,406.78 and 1,384.02

Step by Step Solution

1. Step 1: Write the proportion equation
   3,605.31 : 5,406.78 = 1,384.02 : x
2. Step 2: Convert to fraction form
   3,605.31/5,406.78 = 1,384.02/x
3. Step 3: Cross multiply
   3,605.31x = 5,406.78 × 1,384.02
4. Step 4: Simplify right side
   3,605.31x = 7,483,091.66
5. Step 5: Solve for x
   x = 7,483,091.66/3,605.31
6. Step 6: Final answer
   x = 2,075.58