Finding the Fourth Proportional to 3,395.31, 5,092.83 and 1,990.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,395.31 : 5,092.83 = 1,990.50 : x
2. Step 2: Convert to fraction form
   3,395.31/5,092.83 = 1,990.50/x
3. Step 3: Cross multiply
   3,395.31x = 5,092.83 × 1,990.50
4. Step 4: Simplify right side
   3,395.31x = 10,137,278.12
5. Step 5: Solve for x
   x = 10,137,278.12/3,395.31
6. Step 6: Final answer
   x = 2,985.67