Finding the Fourth Proportional to 3,625.62, 5,429.72 and 1,978.08

Step by Step Solution

1. Step 1: Write the proportion equation
   3,625.62 : 5,429.72 = 1,978.08 : x
2. Step 2: Convert to fraction form
   3,625.62/5,429.72 = 1,978.08/x
3. Step 3: Cross multiply
   3,625.62x = 5,429.72 × 1,978.08
4. Step 4: Simplify right side
   3,625.62x = 10,740,410.65
5. Step 5: Solve for x
   x = 10,740,410.65/3,625.62
6. Step 6: Final answer
   x = 2,962.37