Finding the Fourth Proportional to 5,787.60, 7,991.46 and 5,345.32

Step by Step Solution

1. Step 1: Write the proportion equation
   5,787.60 : 7,991.46 = 5,345.32 : x
2. Step 2: Convert to fraction form
   5,787.60/7,991.46 = 5,345.32/x
3. Step 3: Cross multiply
   5,787.60x = 7,991.46 × 5,345.32
4. Step 4: Simplify right side
   5,787.60x = 42,716,910.97
5. Step 5: Solve for x
   x = 42,716,910.97/5,787.60
6. Step 6: Final answer
   x = 7,380.76