Finding the Fourth Proportional to 4,890.10, 7,335.59 and 1,380.15

Step by Step Solution

1. Step 1: Write the proportion equation
   4,890.10 : 7,335.59 = 1,380.15 : x
2. Step 2: Convert to fraction form
   4,890.10/7,335.59 = 1,380.15/x
3. Step 3: Cross multiply
   4,890.10x = 7,335.59 × 1,380.15
4. Step 4: Simplify right side
   4,890.10x = 10,124,179.78
5. Step 5: Solve for x
   x = 10,124,179.78/4,890.10
6. Step 6: Final answer
   x = 2,070.34