Finding the Fourth Proportional to 9,000.96, 12,420.73 and 5,643.63

Step by Step Solution

1. Step 1: Write the proportion equation
   9,000.96 : 12,420.73 = 5,643.63 : x
2. Step 2: Convert to fraction form
   9,000.96/12,420.73 = 5,643.63/x
3. Step 3: Cross multiply
   9,000.96x = 12,420.73 × 5,643.63
4. Step 4: Simplify right side
   9,000.96x = 70,097,928.24
5. Step 5: Solve for x
   x = 70,097,928.24/9,000.96
6. Step 6: Final answer
   x = 7,787.83