Finding the Fourth Proportional to 1,612.32, 2,419.16 and 688.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,612.32 : 2,419.16 = 688.07 : x
2. Step 2: Convert to fraction form
   1,612.32/2,419.16 = 688.07/x
3. Step 3: Cross multiply
   1,612.32x = 2,419.16 × 688.07
4. Step 4: Simplify right side
   1,612.32x = 1,664,535.89
5. Step 5: Solve for x
   x = 1,664,535.89/1,612.32
6. Step 6: Final answer
   x = 1,032.39