Finding the Fourth Proportional to 1,429.37, 1,971.95 and 931.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,429.37 : 1,971.95 = 931.83 : x
2. Step 2: Convert to fraction form
   1,429.37/1,971.95 = 931.83/x
3. Step 3: Cross multiply
   1,429.37x = 1,971.95 × 931.83
4. Step 4: Simplify right side
   1,429.37x = 1,837,517.51
5. Step 5: Solve for x
   x = 1,837,517.51/1,429.37
6. Step 6: Final answer
   x = 1,285.55