Finding the Fourth Proportional to 1,594.21, 2,199.72 and 931.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,594.21 : 2,199.72 = 931.18 : x
2. Step 2: Convert to fraction form
   1,594.21/2,199.72 = 931.18/x
3. Step 3: Cross multiply
   1,594.21x = 2,199.72 × 931.18
4. Step 4: Simplify right side
   1,594.21x = 2,048,335.27
5. Step 5: Solve for x
   x = 2,048,335.27/1,594.21
6. Step 6: Final answer
   x = 1,284.86