Finding the Fourth Proportional to 1,290.72, 1,935.98 and 741.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,290.72 : 1,935.98 = 741.18 : x
2. Step 2: Convert to fraction form
   1,290.72/1,935.98 = 741.18/x
3. Step 3: Cross multiply
   1,290.72x = 1,935.98 × 741.18
4. Step 4: Simplify right side
   1,290.72x = 1,434,909.66
5. Step 5: Solve for x
   x = 1,434,909.66/1,290.72
6. Step 6: Final answer
   x = 1,111.71