Finding the Fourth Proportional to 1,290.15, 1,934.82 and 742.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,290.15 : 1,934.82 = 742.59 : x
2. Step 2: Convert to fraction form
   1,290.15/1,934.82 = 742.59/x
3. Step 3: Cross multiply
   1,290.15x = 1,934.82 × 742.59
4. Step 4: Simplify right side
   1,290.15x = 1,436,777.98
5. Step 5: Solve for x
   x = 1,436,777.98/1,290.15
6. Step 6: Final answer
   x = 1,113.65