Finding the Fourth Proportional to 1,402.79, 2,105.39 and 753.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,402.79 : 2,105.39 = 753.98 : x
2. Step 2: Convert to fraction form
   1,402.79/2,105.39 = 753.98/x
3. Step 3: Cross multiply
   1,402.79x = 2,105.39 × 753.98
4. Step 4: Simplify right side
   1,402.79x = 1,587,413.31
5. Step 5: Solve for x
   x = 1,587,413.31/1,402.79
6. Step 6: Final answer
   x = 1,131.62