Finding the Fourth Proportional to 9,408.46, 12,985.02 and 5,430.94

Step by Step Solution

1. Step 1: Write the proportion equation
   9,408.46 : 12,985.02 = 5,430.94 : x
2. Step 2: Convert to fraction form
   9,408.46/12,985.02 = 5,430.94/x
3. Step 3: Cross multiply
   9,408.46x = 12,985.02 × 5,430.94
4. Step 4: Simplify right side
   9,408.46x = 70,520,864.52
5. Step 5: Solve for x
   x = 70,520,864.52/9,408.46
6. Step 6: Final answer
   x = 7,495.47