Finding the Fourth Proportional to 3,615.90, 5,428.78 and 1,862.34

Step by Step Solution

1. Step 1: Write the proportion equation
   3,615.90 : 5,428.78 = 1,862.34 : x
2. Step 2: Convert to fraction form
   3,615.90/5,428.78 = 1,862.34/x
3. Step 3: Cross multiply
   3,615.90x = 5,428.78 × 1,862.34
4. Step 4: Simplify right side
   3,615.90x = 10,110,234.15
5. Step 5: Solve for x
   x = 10,110,234.15/3,615.90
6. Step 6: Final answer
   x = 2,796.05