Finding the Fourth Proportional to 9,150.74, 12,623.36 and 5,787.90

Step by Step Solution

1. Step 1: Write the proportion equation
   9,150.74 : 12,623.36 = 5,787.90 : x
2. Step 2: Convert to fraction form
   9,150.74/12,623.36 = 5,787.90/x
3. Step 3: Cross multiply
   9,150.74x = 12,623.36 × 5,787.90
4. Step 4: Simplify right side
   9,150.74x = 73,062,745.34
5. Step 5: Solve for x
   x = 73,062,745.34/9,150.74
6. Step 6: Final answer
   x = 7,984.35