Finding the Fourth Proportional to 3,449.07, 5,165.37 and 1,985.15

Step by Step Solution

1. Step 1: Write the proportion equation
   3,449.07 : 5,165.37 = 1,985.15 : x
2. Step 2: Convert to fraction form
   3,449.07/5,165.37 = 1,985.15/x
3. Step 3: Cross multiply
   3,449.07x = 5,165.37 × 1,985.15
4. Step 4: Simplify right side
   3,449.07x = 10,254,008.43
5. Step 5: Solve for x
   x = 10,254,008.43/3,449.07
6. Step 6: Final answer
   x = 2,972.98