Finding the Fourth Proportional to 1,429.35, 1,973.73 and 931.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,429.35 : 1,973.73 = 931.80 : x
2. Step 2: Convert to fraction form
   1,429.35/1,973.73 = 931.80/x
3. Step 3: Cross multiply
   1,429.35x = 1,973.73 × 931.80
4. Step 4: Simplify right side
   1,429.35x = 1,839,121.61
5. Step 5: Solve for x
   x = 1,839,121.61/1,429.35
6. Step 6: Final answer
   x = 1,286.68