Finding the Fourth Proportional to 2,830.55, 3,902.63 and 1,820.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,830.55 : 3,902.63 = 1,820.48 : x
2. Step 2: Convert to fraction form
   2,830.55/3,902.63 = 1,820.48/x
3. Step 3: Cross multiply
   2,830.55x = 3,902.63 × 1,820.48
4. Step 4: Simplify right side
   2,830.55x = 7,104,631.25
5. Step 5: Solve for x
   x = 7,104,631.25/2,830.55
6. Step 6: Final answer
   x = 2,509.99