Finding the Fourth Proportional to 1,413.63, 2,118.10 and 1,000.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,413.63 : 2,118.10 = 1,000.72 : x
2. Step 2: Convert to fraction form
   1,413.63/2,118.10 = 1,000.72/x
3. Step 3: Cross multiply
   1,413.63x = 2,118.10 × 1,000.72
4. Step 4: Simplify right side
   1,413.63x = 2,119,625.03
5. Step 5: Solve for x
   x = 2,119,625.03/1,413.63
6. Step 6: Final answer
   x = 1,499.42