Finding the Fourth Proportional to 1,056.68, 1,455.78 and 761.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,056.68 : 1,455.78 = 761.42 : x
2. Step 2: Convert to fraction form
   1,056.68/1,455.78 = 761.42/x
3. Step 3: Cross multiply
   1,056.68x = 1,455.78 × 761.42
4. Step 4: Simplify right side
   1,056.68x = 1,108,460.01
5. Step 5: Solve for x
   x = 1,108,460.01/1,056.68
6. Step 6: Final answer
   x = 1,049.00