Finding the Fourth Proportional to 1,393.89, 2,092.05 and 745.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,393.89 : 2,092.05 = 745.08 : x
2. Step 2: Convert to fraction form
   1,393.89/2,092.05 = 745.08/x
3. Step 3: Cross multiply
   1,393.89x = 2,092.05 × 745.08
4. Step 4: Simplify right side
   1,393.89x = 1,558,744.61
5. Step 5: Solve for x
   x = 1,558,744.61/1,393.89
6. Step 6: Final answer
   x = 1,118.27