Finding the Fourth Proportional to 2,390.45, 3,299.12 and 1,342.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,390.45 : 3,299.12 = 1,342.50 : x
2. Step 2: Convert to fraction form
   2,390.45/3,299.12 = 1,342.50/x
3. Step 3: Cross multiply
   2,390.45x = 3,299.12 × 1,342.50
4. Step 4: Simplify right side
   2,390.45x = 4,429,061.89
5. Step 5: Solve for x
   x = 4,429,061.89/2,390.45
6. Step 6: Final answer
   x = 1,852.82