Finding the Fourth Proportional to 2,645.19, 3,967.16 and 1,002.51

Step by Step Solution

1. Step 1: Write the proportion equation
   2,645.19 : 3,967.16 = 1,002.51 : x
2. Step 2: Convert to fraction form
   2,645.19/3,967.16 = 1,002.51/x
3. Step 3: Cross multiply
   2,645.19x = 3,967.16 × 1,002.51
4. Step 4: Simplify right side
   2,645.19x = 3,977,112.56
5. Step 5: Solve for x
   x = 3,977,112.56/2,645.19
6. Step 6: Final answer
   x = 1,503.53