Finding the Fourth Proportional to 1,781.33, 2,672.80 and 742.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,781.33 : 2,672.80 = 742.10 : x
2. Step 2: Convert to fraction form
   1,781.33/2,672.80 = 742.10/x
3. Step 3: Cross multiply
   1,781.33x = 2,672.80 × 742.10
4. Step 4: Simplify right side
   1,781.33x = 1,983,469.66
5. Step 5: Solve for x
   x = 1,983,469.66/1,781.33
6. Step 6: Final answer
   x = 1,113.48