Finding the Fourth Proportional to 9,401.43, 12,973.63 and 5,421.99

Step by Step Solution

1. Step 1: Write the proportion equation
   9,401.43 : 12,973.63 = 5,421.99 : x
2. Step 2: Convert to fraction form
   9,401.43/12,973.63 = 5,421.99/x
3. Step 3: Cross multiply
   9,401.43x = 12,973.63 × 5,421.99
4. Step 4: Simplify right side
   9,401.43x = 70,342,892.12
5. Step 5: Solve for x
   x = 70,342,892.12/9,401.43
6. Step 6: Final answer
   x = 7,482.15