Finding the Fourth Proportional to 9,679.33, 13,356.78 and 5,430.07

Step by Step Solution

1. Step 1: Write the proportion equation
   9,679.33 : 13,356.78 = 5,430.07 : x
2. Step 2: Convert to fraction form
   9,679.33/13,356.78 = 5,430.07/x
3. Step 3: Cross multiply
   9,679.33x = 13,356.78 × 5,430.07
4. Step 4: Simplify right side
   9,679.33x = 72,528,250.37
5. Step 5: Solve for x
   x = 72,528,250.37/9,679.33
6. Step 6: Final answer
   x = 7,493.11