Finding the Fourth Proportional to 2,407.80, 3,322.61 and 1,345.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,407.80 : 3,322.61 = 1,345.50 : x
2. Step 2: Convert to fraction form
   2,407.80/3,322.61 = 1,345.50/x
3. Step 3: Cross multiply
   2,407.80x = 3,322.61 × 1,345.50
4. Step 4: Simplify right side
   2,407.80x = 4,470,571.76
5. Step 5: Solve for x
   x = 4,470,571.76/2,407.80
6. Step 6: Final answer
   x = 1,856.70