Finding the Fourth Proportional to 2,130.38, 2,940.27 and 1,780.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,130.38 : 2,940.27 = 1,780.94 : x
2. Step 2: Convert to fraction form
   2,130.38/2,940.27 = 1,780.94/x
3. Step 3: Cross multiply
   2,130.38x = 2,940.27 × 1,780.94
4. Step 4: Simplify right side
   2,130.38x = 5,236,444.45
5. Step 5: Solve for x
   x = 5,236,444.45/2,130.38
6. Step 6: Final answer
   x = 2,457.99