Finding the Fourth Proportional to 1,127.56, 1,555.98 and 661.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,127.56 : 1,555.98 = 661.96 : x
2. Step 2: Convert to fraction form
   1,127.56/1,555.98 = 661.96/x
3. Step 3: Cross multiply
   1,127.56x = 1,555.98 × 661.96
4. Step 4: Simplify right side
   1,127.56x = 1,029,996.52
5. Step 5: Solve for x
   x = 1,029,996.52/1,127.56
6. Step 6: Final answer
   x = 913.47