Finding the Fourth Proportional to 1,875.12, 2,812.83 and 1,413.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,875.12 : 2,812.83 = 1,413.78 : x
2. Step 2: Convert to fraction form
   1,875.12/2,812.83 = 1,413.78/x
3. Step 3: Cross multiply
   1,875.12x = 2,812.83 × 1,413.78
4. Step 4: Simplify right side
   1,875.12x = 3,976,722.80
5. Step 5: Solve for x
   x = 3,976,722.80/1,875.12
6. Step 6: Final answer
   x = 2,120.78