Finding the Fourth Proportional to 2,393.32, 3,588.71 and 931

Step by Step Solution

1. Step 1: Write the proportion equation
   2,393.32 : 3,588.71 = 931 : x
2. Step 2: Convert to fraction form
   2,393.32/3,588.71 = 931/x
3. Step 3: Cross multiply
   2,393.32x = 3,588.71 × 931
4. Step 4: Simplify right side
   2,393.32x = 3,341,089.01
5. Step 5: Solve for x
   x = 3,341,089.01/2,393.32
6. Step 6: Final answer
   x = 1,396.01