Finding the Fourth Proportional to 9,570.63, 13,207.41 and 5,378.88

Step by Step Solution

1. Step 1: Write the proportion equation
   9,570.63 : 13,207.41 = 5,378.88 : x
2. Step 2: Convert to fraction form
   9,570.63/13,207.41 = 5,378.88/x
3. Step 3: Cross multiply
   9,570.63x = 13,207.41 × 5,378.88
4. Step 4: Simplify right side
   9,570.63x = 71,041,073.50
5. Step 5: Solve for x
   x = 71,041,073.50/9,570.63
6. Step 6: Final answer
   x = 7,422.82