Finding the Fourth Proportional to 9,678.50, 13,356.60 and 5,487.02

Step by Step Solution

1. Step 1: Write the proportion equation
   9,678.50 : 13,356.60 = 5,487.02 : x
2. Step 2: Convert to fraction form
   9,678.50/13,356.60 = 5,487.02/x
3. Step 3: Cross multiply
   9,678.50x = 13,356.60 × 5,487.02
4. Step 4: Simplify right side
   9,678.50x = 73,287,931.33
5. Step 5: Solve for x
   x = 73,287,931.33/9,678.50
6. Step 6: Final answer
   x = 7,572.24