Finding the Fourth Proportional to 9,403.18, 12,977.70 and 5,424.22

Step by Step Solution

1. Step 1: Write the proportion equation
   9,403.18 : 12,977.70 = 5,424.22 : x
2. Step 2: Convert to fraction form
   9,403.18/12,977.70 = 5,424.22/x
3. Step 3: Cross multiply
   9,403.18x = 12,977.70 × 5,424.22
4. Step 4: Simplify right side
   9,403.18x = 70,393,899.89
5. Step 5: Solve for x
   x = 70,393,899.89/9,403.18
6. Step 6: Final answer
   x = 7,486.18