Finding the Fourth Proportional to 3,345.31, 5,017.94 and 2,615.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,345.31 : 5,017.94 = 2,615.50 : x
2. Step 2: Convert to fraction form
   3,345.31/5,017.94 = 2,615.50/x
3. Step 3: Cross multiply
   3,345.31x = 5,017.94 × 2,615.50
4. Step 4: Simplify right side
   3,345.31x = 13,124,422.07
5. Step 5: Solve for x
   x = 13,124,422.07/3,345.31
6. Step 6: Final answer
   x = 3,923.23