Finding the Fourth Proportional to 9,403.63, 12,977.82 and 5,426.06

Step by Step Solution

1. Step 1: Write the proportion equation
   9,403.63 : 12,977.82 = 5,426.06 : x
2. Step 2: Convert to fraction form
   9,403.63/12,977.82 = 5,426.06/x
3. Step 3: Cross multiply
   9,403.63x = 12,977.82 × 5,426.06
4. Step 4: Simplify right side
   9,403.63x = 70,418,365.10
5. Step 5: Solve for x
   x = 70,418,365.10/9,403.63
6. Step 6: Final answer
   x = 7,488.43