Finding the Fourth Proportional to 1,369.72, 2,054.56 and 929.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,369.72 : 2,054.56 = 929.88 : x
2. Step 2: Convert to fraction form
   1,369.72/2,054.56 = 929.88/x
3. Step 3: Cross multiply
   1,369.72x = 2,054.56 × 929.88
4. Step 4: Simplify right side
   1,369.72x = 1,910,491.93
5. Step 5: Solve for x
   x = 1,910,491.93/1,369.72
6. Step 6: Final answer
   x = 1,394.81