Finding the Fourth Proportional to 1,499.40, 2,069.01 and 931.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,499.40 : 2,069.01 = 931.86 : x
2. Step 2: Convert to fraction form
   1,499.40/2,069.01 = 931.86/x
3. Step 3: Cross multiply
   1,499.40x = 2,069.01 × 931.86
4. Step 4: Simplify right side
   1,499.40x = 1,928,027.66
5. Step 5: Solve for x
   x = 1,928,027.66/1,499.40
6. Step 6: Final answer
   x = 1,285.87