Finding the Fourth Proportional to 9,953.43, 13,736.57 and 5,478.03

Step by Step Solution

1. Step 1: Write the proportion equation
   9,953.43 : 13,736.57 = 5,478.03 : x
2. Step 2: Convert to fraction form
   9,953.43/13,736.57 = 5,478.03/x
3. Step 3: Cross multiply
   9,953.43x = 13,736.57 × 5,478.03
4. Step 4: Simplify right side
   9,953.43x = 75,249,315.17
5. Step 5: Solve for x
   x = 75,249,315.17/9,953.43
6. Step 6: Final answer
   x = 7,560.14