Finding the Fourth Proportional to 2,748.30, 4,116.46 and 1,428.07

Step by Step Solution

1. Step 1: Write the proportion equation
   2,748.30 : 4,116.46 = 1,428.07 : x
2. Step 2: Convert to fraction form
   2,748.30/4,116.46 = 1,428.07/x
3. Step 3: Cross multiply
   2,748.30x = 4,116.46 × 1,428.07
4. Step 4: Simplify right side
   2,748.30x = 5,878,579.17
5. Step 5: Solve for x
   x = 5,878,579.17/2,748.30
6. Step 6: Final answer
   x = 2,138.99