Finding the Fourth Proportional to 1,111.35, 1,531.94 and 761.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.35 : 1,531.94 = 761.43 : x
2. Step 2: Convert to fraction form
   1,111.35/1,531.94 = 761.43/x
3. Step 3: Cross multiply
   1,111.35x = 1,531.94 × 761.43
4. Step 4: Simplify right side
   1,111.35x = 1,166,461.27
5. Step 5: Solve for x
   x = 1,166,461.27/1,111.35
6. Step 6: Final answer
   x = 1,049.59