Finding the Fourth Proportional to 9,380.85, 12,946.70 and 5,401.88

Step by Step Solution

1. Step 1: Write the proportion equation
   9,380.85 : 12,946.70 = 5,401.88 : x
2. Step 2: Convert to fraction form
   9,380.85/12,946.70 = 5,401.88/x
3. Step 3: Cross multiply
   9,380.85x = 12,946.70 × 5,401.88
4. Step 4: Simplify right side
   9,380.85x = 69,936,428.05
5. Step 5: Solve for x
   x = 69,936,428.05/9,380.85
6. Step 6: Final answer
   x = 7,455.23