Finding the Fourth Proportional to 1,781.31, 2,672.18 and 742.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,781.31 : 2,672.18 = 742.02 : x
2. Step 2: Convert to fraction form
   1,781.31/2,672.18 = 742.02/x
3. Step 3: Cross multiply
   1,781.31x = 2,672.18 × 742.02
4. Step 4: Simplify right side
   1,781.31x = 1,982,812.86
5. Step 5: Solve for x
   x = 1,982,812.86/1,781.31
6. Step 6: Final answer
   x = 1,113.12