Finding the Fourth Proportional to 9,399.84, 12,973.14 and 5,420.16

Step by Step Solution

1. Step 1: Write the proportion equation
   9,399.84 : 12,973.14 = 5,420.16 : x
2. Step 2: Convert to fraction form
   9,399.84/12,973.14 = 5,420.16/x
3. Step 3: Cross multiply
   9,399.84x = 12,973.14 × 5,420.16
4. Step 4: Simplify right side
   9,399.84x = 70,316,494.50
5. Step 5: Solve for x
   x = 70,316,494.50/9,399.84
6. Step 6: Final answer
   x = 7,480.61