Finding the Fourth Proportional to 1,625.43, 2,435.86 and 931.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,625.43 : 2,435.86 = 931.06 : x
2. Step 2: Convert to fraction form
   1,625.43/2,435.86 = 931.06/x
3. Step 3: Cross multiply
   1,625.43x = 2,435.86 × 931.06
4. Step 4: Simplify right side
   1,625.43x = 2,267,931.81
5. Step 5: Solve for x
   x = 2,267,931.81/1,625.43
6. Step 6: Final answer
   x = 1,395.28