Finding the Fourth Proportional to 2,530.99, 3,789.78 and 1,980.58

Step by Step Solution

1. Step 1: Write the proportion equation
   2,530.99 : 3,789.78 = 1,980.58 : x
2. Step 2: Convert to fraction form
   2,530.99/3,789.78 = 1,980.58/x
3. Step 3: Cross multiply
   2,530.99x = 3,789.78 × 1,980.58
4. Step 4: Simplify right side
   2,530.99x = 7,505,962.47
5. Step 5: Solve for x
   x = 7,505,962.47/2,530.99
6. Step 6: Final answer
   x = 2,965.62