Finding the Fourth Proportional to 9,619.50, 13,275.12 and 5,427.76

Step by Step Solution

1. Step 1: Write the proportion equation
   9,619.50 : 13,275.12 = 5,427.76 : x
2. Step 2: Convert to fraction form
   9,619.50/13,275.12 = 5,427.76/x
3. Step 3: Cross multiply
   9,619.50x = 13,275.12 × 5,427.76
4. Step 4: Simplify right side
   9,619.50x = 72,054,165.33
5. Step 5: Solve for x
   x = 72,054,165.33/9,619.50
6. Step 6: Final answer
   x = 7,490.43