Finding the Fourth Proportional to 1,339.84, 2,004.72 and 929.77

Step by Step Solution

1. Step 1: Write the proportion equation
   1,339.84 : 2,004.72 = 929.77 : x
2. Step 2: Convert to fraction form
   1,339.84/2,004.72 = 929.77/x
3. Step 3: Cross multiply
   1,339.84x = 2,004.72 × 929.77
4. Step 4: Simplify right side
   1,339.84x = 1,863,928.51
5. Step 5: Solve for x
   x = 1,863,928.51/1,339.84
6. Step 6: Final answer
   x = 1,391.16