Finding the Fourth Proportional to 5,335.89, 8,004.15 and 1,638.15

Step by Step Solution

1. Step 1: Write the proportion equation
   5,335.89 : 8,004.15 = 1,638.15 : x
2. Step 2: Convert to fraction form
   5,335.89/8,004.15 = 1,638.15/x
3. Step 3: Cross multiply
   5,335.89x = 8,004.15 × 1,638.15
4. Step 4: Simplify right side
   5,335.89x = 13,111,998.32
5. Step 5: Solve for x
   x = 13,111,998.32/5,335.89
6. Step 6: Final answer
   x = 2,457.32