Finding the Fourth Proportional to 1,127.72, 1,554.31 and 929.14

Step by Step Solution

1. Step 1: Write the proportion equation
   1,127.72 : 1,554.31 = 929.14 : x
2. Step 2: Convert to fraction form
   1,127.72/1,554.31 = 929.14/x
3. Step 3: Cross multiply
   1,127.72x = 1,554.31 × 929.14
4. Step 4: Simplify right side
   1,127.72x = 1,444,171.59
5. Step 5: Solve for x
   x = 1,444,171.59/1,127.72
6. Step 6: Final answer
   x = 1,280.61